In summary, vectors are quantities with both magnitude and direction, and their addition and multiplication by scalars follow specific rules. Scalars are quantities with only magnitude and are added by simple arithmetic. The correct option for any statement about vectors and scalars would be the one that accurately reflects these properties
To provide a solution to the question, we need to understand the key differences between vectors and scalars as described by the students in the chart. Here are the typical characteristics that distinguish vectors from scalars:
1. Magnitude and Direction: Vectors have both magnitude and direction, whereas scalars have only magnitude. This is the fundamental difference between the two. For example, velocity is a vector quantity because it describes both the speed (magnitude) and the direction of motion, while speed alone is a scalar quantity.
2. Representation: Vectors are often represented by arrows, where the length of the arrow corresponds to the magnitude and the arrowhead indicates the direction. Scalars are typically represented by a number with units, if applicable.
3. Addition: When adding vectors, both their magnitudes and directions must be considered, which often involves geometric construction or trigonometric calculations. In contrast, scalar addition is straightforward and involves simply adding the numerical values.
4. Multiplication by a Scalar: Multiplying a vector by a scalar changes the magnitude of the vector but not its direction. The result is a vector that is parallel to the original vector.
5. Dimensionality: Vectors can be one-dimensional (straight line), two-dimensional (plane), or three-dimensional (space). Scalars are zero-dimensional, as they are just single values without direction.
6. Physical Quantities: Examples of vector quantities include displacement, velocity, acceleration, and force. Examples of scalar quantities include mass, temperature, energy, and time.
Based on these characteristics, the students' statements can be analyzed to determine if they are correct or incorrect. For instance, if a student says that a vector has only magnitude, this statement is incorrect because vectors must have both magnitude and direction.
To solve the question accurately, we would need to see the specific statements made by each student in the chart. However, without the actual statements, we can only provide a general explanation of the differences between vectors and scalars.
In summary, vectors are quantities with both magnitude and direction, and their addition and multiplication by scalars follow specific rules. Scalars are quantities with only magnitude and are added by simple arithmetic. The correct option for any statement about vectors and scalars would be the one that accurately reflects these properties."
is cleaning bleach a pure substance or mixture and why
While performing an experiment, the student creating the data table is not sure if a measurement from the experiment is a vector or scalar. Which question should she ask to determine if a measurement is a vector or a scalar?
A) Is the measurement a rate?
B) Is the measurement in metric units?
C) Does the measurement include direction?
D) Does the measurement include magnitude?
Before coming into conclusion first we have to understand both scalar and vector .
A scalar quantity is a physical quantity which has only magnitude for it's complete specification.
A vector quantity is that physical quantity which not only requires magnitude but also possesses direction for it's complete specification.
So the most important factor that differentiate vector from scalar is the direction.
As per the question the student is doing an experiment where he is recording the data obtained during the process.
In order to arrange them in data table, he should ask about the direction of the quantity under consideration.
Hence the correct option is the third option(C)i.e does the measurement include direction?
An object is suspended from the ceiling with two wires that make an angle of 40 with the ceiling the weight od the body is 150N what is the tension in each wire?
With questions involving Forces, it is best to draw a force diagram to model the problem, like the one shown below
We have two tension acting on the particle; T₁ and T₂. The tensions are vectors directed toward the ceiling.
There's also the force as weight acting vertically downwards from the particle. This force is 150N.
As the tension force acting in an angle, we will have to consider the sine and sine components of the tensions.
We will also solve the force in the direction of x-axis and y-axis
Solving in x-axis direction:
T₂ cos 40° - T₁ cos 40° = 0
T₂ cos 40° = T₁ cos 40°
T₂ = T₁ ...(Eq 1)
Solving in y-axis direction:
T₁ sin 40° + T₂ sin 40° - 150N = 0
T₁ sin 40° + T₂ sin 40° = 150 ⇒ we know from (Eq 1) that T₁ = T₂
2T₁ sin 40° = 150
T₁ sin 40° = 75
T₁ = 75 ÷ sin 40°
T₁ = 116.7 N
Since T₁ = T₂, so T₂ = 116.7N
I hope this helps
A rock falls off a cliff and falls for 3 secs. How high was the cliff?
Final answer:
To find the height of the cliff from which a rock falls in 3 seconds, we use the formula s = ut + ½ at², with an initial speed (u) of 0 m/s and acceleration (a) of 9.81 m/s² due to gravity. The calculation shows that the cliff is approximately 44.145 meters high.
Explanation:
The question requires the calculation of the height from which a rock falls off a cliff, given that it falls for 3 seconds. The scenario assumes Earth's gravity as the only acting force, thereby ignoring air resistance. To determine the height of the cliff, we will use the kinematic equation for freely falling objects:
s = ut + ½ at²
where:
s is the displacement (the height of the cliff, in this case)u is the initial speed (0 m/s, since the rock is dropped)t is the time of the fall (3 seconds)a is the acceleration due to gravity (9.81 m/s² on Earth)Plugging the values into the equation:
s = 0 m/s * 3 s + ½ * 9.81 m/s² * (3 s)²
s = ½ * 9.81 m/s² * 9 s
s = 4.905 m/s² * 9 s
s = 44.145 m
Hence, the cliff is approximately 44.145 meters high.
If a vector that is 3 cm long represents 30 km/h what velocity does a 5cm long vector which is drawn using the same scale
The 150 scale if my calculations are correct
can someone describe how someone is moving-- have examples of positive velocity negative velocity and acceleration and the person being at rest. Can someone help me asap i need Help!! making it into a story
Assume the motion when you are in the car or in the school bus to go to the school.
To describe the motion the first thing you need is a point of reference. Assume this is your house.
This should be a description:
When you are sitting and the car has not started to move you are at rest.The car starts moving from rest, gaining speed, accelerating. You start to move away from your house, with a positive velocity (from you house to your school) and positive acceleration (velocity increases).The car reaches a limit speed of 40mph, and then moves at constant speed. The motion is uniform, the velocity is constant, positive, since you move in the same direction), and the acceleration is zero.When the car approaches the school, the driver starts to slow down. Then, you speed is lower but yet the velocity is positive, as you are going in the same direction. The acceleration is negative because it is in the opposite direction of the motion.When the car stops, you are again at rest: zero velocity and zero acceleration.In all the path your velocity was positive, constant at times (zero acceleration) and variable at others (accelerating or decelerating).When you comeback home, then you can start to compute negative velocities, as you will be decreasing the distance from your point of reference (your house).A small increase in aperture will result in
a.small increase in brightness large increase in brightness small decrease in size large decrease in sizea. small increase in brightness
A small increase in aperture will result in a small increase in brightness.
Answer:
large increase in brightness
Explanation:
just trust me.
Three forces act simultaneously on point j. one force is 10 newton's north
Answer:
The answer is 24.2 N.
Explanation:
Y- component = 10 N + 15 cos (30) = 23 N (North)
X - component = 15 N - 15 sin (30) = 7.5 N (west)
As, East, west and North are opposite direction so minus,
Magnitude = √ 23² + 7.5²
= 24.2 N.
The magnitude of the resultant force is 22.99 N.
How to solveThe given forces are:
A force of 10 N north
A force of 15 N west
A force of 15 N 30 degrees east of north
The first two forces can be represented by vectors
A and as follows:
[tex]$\vec{A} = 10 \hat{\imath}$\\$\vec{B} = -15 \hat{\jmath}$[/tex]
The third force can be decomposed into its components as follows:
[tex]$\vec{C} = 15 \cos{30^\circ} \hat{\imath} + 15 \sin{30^\circ} \hat{\jmath}$\\= 12.5 \hat{\imath} + 7.5 \hat{\jmath}$[/tex]
The resultant force
R is the sum of the three forces:
[tex]\vec{R} = \vec{A} + \vec{B} + \vec{C}\\= 10 \hat{\imath} - 15 \hat{\jmath} + 12.5 \hat{\imath} + 7.5 \hat{\jmath}\\= 22.5 \hat{\imath} - 7.5 \hat{\jmath}[/tex]
The magnitude of
R is:
[tex]\| \vec{R} \| = \sqrt{(22.5)^2 + (-7.5)^2}[/tex]
= \sqrt{510.25}
= 22.99 N
Therefore, the magnitude of the resultant force is 22.99 N.
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At take off, a plane flies 100 km north before turning to fly 200 km east. How far is its destination from where the plane took off?
Question 3 options:
300 km
224 km
200 km
173 km
While Bob is demonstrating the gravitational force on falling objects to his class, he drops an 1.0 lb bag of feathers from the top of the science building. Determine the distance the bag has traveled after falling for 1.5 seconds assuming it has reach free fall and given the gravitational acceleration of 9.8 m/sec2.
A) 7.4 m
B) 11 m
C) 15 m
D) 22 m
The 1.0 lb bag of feathers, dropped under free fall conditions from the building, would have fallen approximately 11 meters after 1.5 seconds, according to the physics formula for distance traveled during free fall. The correct answer is (B) 11 m.
Explanation:In this problem, Bob is examining the gravitational force acting on a falling object, specifically a 1.0 lb bag of feathers. To determine the distance the feathers have fallen after 1.5 seconds under free fall conditions, we utilize the physics formula for distance traveled during free fall, represented as d = 0.5 * g * t^2, where d is the distance, g is the gravitational acceleration (9.8 m/sec2), and t is the time.
Substitute the given values into the equation, you get d = 0.5 * 9.8 * (1.5)^2. After calculating, it results in approximately 11 meters. Therefore, the bag of feathers has fallen 11 meters after 1.5 seconds, assuming it has reached free fall. This implies that the correct answer is (B) 11 m.
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The bag has traveled approximately 7.4 meters after falling for 1.5 seconds.
Explanation:To determine the distance the bag has traveled after falling for 1.5 seconds, we can use the equation of motion d = ½gt^2, where d is the distance, g is the gravitational acceleration, and t is the time.
Given that the gravitational acceleration is 9.8 m/sec^2 and the time is 1.5 seconds, we can substitute these values into the equation to calculate the distance:
d = ½ × 9.8 × (1.5)^2
Simplifying the equation, we have:
d = 0.5 × 9.8 × 2.25 = 7.425 m
Therefore, the bag has traveled a distance of approximately 7.4 meters after falling for 1.5 seconds.
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What is the minimum amount of data points an experiment should gather?
The answer is "Three".
At the point when individuals take studies for factual purposes or when the Statistics Agency comes around and gets everyone's data, data from one individual is one information point for them. Toward the finish of its exploration or overview, the organization will have accumulated numerous bits of data from numerous individuals. One piece of information equals with one data point.
According to Coulomb's Law, what effect does the separation distance have on the electric force?
A. Only in charging by induction can the electric force act at a distance.
B. The objects must be in contact with one another for the electric force to affect them.
C. The electric force is zero for very small distances, but increases for large distances.
D. The electric force varies with the distance between the charges. The closer they are, the stronger the force. The farther apart they are, the weaker the force.
As per Coulomb's law of force we can say
[tex]F = \frac{kq_1q_2}{r^2}[/tex]
here we can say
[tex]q_1,q_2[/tex]= magnitude of two charges
r = distance between two charges
so here we can say that force between two charges depends on
(i)product of charge of two point charges
(ii)distance between the two point charges
so here if we increase the distance force will decrease and vice versa.
So correct statement for the electrostatic force is given as
D. The electric force varies with the distance between the charges. The closer they are, the stronger the force. The farther apart they are, the weaker the force.
Answer:
D
Explanation:
Plz answer this and brainliest I will give. Dont skip!
A ball is thrown horizontally from the top of
a building 89 m high. The ball strikes the
ground 80 m horizontally from the point of
release.
What is the speed of the ball just before it
strikes the ground?
Answer in units of m/s.
Vox = ?
Voy = 0 m/s
g = 9.8 m/s
s = 61.7 m
h = 42.4 m
(1)-----------------------------------...
To find the time taken for the ball to travel to the bottom:
For constant acceleration,
s = Voy*t + 0.5*g*t^2
42.4 = 0 + 0.5(9.8)*t^2
t^2 = 42.4 / 4.9
t^2 = 8.6531
t = 2.9417s
(2)-----------------------------------...
For the intial velocity of the horizontal component (Vox) of the ball:
s = Vox*t + 0.5*a*t^2
There is no force acting on the horizontal component, so there is no acceleration.
s = Vox*t
61.7 = 2.9417*Vox
Vox = 181.5029 m/s
(3)-----------------------------------...
Since there is no acceleration acting on the horizontal component, x, it remains constant throughout.
Hence, it is still 181.5029 m/s.
For the final velocity of the vertical component (Vfy) of the ball:
(Vfy)^2 = (Voy)^2 + 2*a*h
Acceleration in this case is the force of gravity.
(Vfy)^2 = 0 + 2*(9.8)*(42.4)
(Vfy)^2 = 831.04
Vfy = 28.8278 m/s
I've clearly explained every step. Hope that answers your question! =D
Answer:
the speed of the ball just before it will be equal to 41.75 m/s
Explanation:
data provided:
h = height of building = 89 m
L = horizontal distance = 80 m
The speed of the ball at maximum height is assumed to be equal to zero. If we use the equation of motion we have:
s = u*t + (a*t^2)/2, where s = distance; u = initial velocity; a = gravity acceleration; t = time
replacing values and clearing t:
t = ((89*2)/9.8)^1/2 = 4.26 s
the speed will be equal to:
vy = uy + a*t = g*t = 9.8*4.26 = 41.75 m/s
A cat leaps into the air to catch a bird with an initial speed of 2.74 m/s at an angle of 60.0° above the ground. What is the highest point of the cat’s trajectory?
A. 0.19 m
B. 10.96 m
C. 0.58 m
D. 0.29 m
Answer: D. 0.29 m
Explanation:
We will use the following equations to describe the leap of the cat:
[tex]y=V_{o}sin\theta t-\frac{gt^{2}}{2}[/tex] (1)
[tex]V_{y}=V_{oy}-gt[/tex] (2)
Where:
[tex]y[/tex] is the height of the cat
[tex]V_{oy}=V_{o}sin\theta[/tex] is the cat's initial velocity
[tex]\theta=60\°[/tex]
[tex]g=9.8m/s^{2}[/tex] is the acceleration due gravity
[tex]t[/tex] is the time
[tex]V_{y}[/tex] is the y-component of the velocity
Now the cat will have its maximum height [tex]y_{max}[/tex] when [tex]V_{y}=0[/tex]. So equation (2) is rewritten as:
[tex]0=V_{oy}-gt[/tex] (3)
Finding [tex]t[/tex]:
[tex]t=\frac{V_{oy}}{g}=\frac{V_{o}sin\theta}{g}[/tex] (4)
[tex]t=\frac{2.74 m/s sin(60\°)}{9.8m/s^{2}}[/tex] (5)
[tex]t=0.24 s[/tex] (6)
Substituting (6) in (1):
[tex]y_{max}=(2.74 m/s)sin(60\°) (0.24 s)-\frac{(9.8m/s^{2})(0.24 s)^{2}}{2}[/tex] (7)
Finally:
[tex]y_{max}=0.287 m \approx 0.29 m[/tex] (8)
The highest point of the cat’s trajectory, considering the initial speed and angle, is found to be 0.29 m using kinematic equations. Therefore, the correct answer is option D.) 0.29 m.
To find the highest point of the cat's trajectory, we need to focus on the vertical component of the initial velocity and use the kinematic equation for vertical motion.
The initial speed of the cat is given as 2.74 m/s at an angle of 60.0° above the ground.
We first decompose this initial velocity into its vertical component:
Vertical component of velocity(Vy),
Vy = V0 * sin(θ) = 2.74 m/s * sin(60.0°) Vy = 2.74 m/s * (√3/2) Vy ≈ 2.37 m/sAt the highest point of the trajectory, the vertical velocity(Vfy) becomes zero. We use the following kinematic equation to find the maximum height (h):
(Vfy)² = (Vy)² - 2ghSince Vfy = 0 at the highest point of the trajectory:
0 = (2.37 m/s)² - 2(9.81 m/s²)hSolving for h:
h = (2.37 m/s)² / (2 * 9.81 m/s²)h ≈ 0.29 mThus, the highest point of the cat’s trajectory is 0.29 m. The correct answer is D. 0.29 m.
Explain how energy from the Sun created music.
-- Energy from the sun was absorbed by grass, grain, and hops, making it possible for them to grow.
-- The grass was eaten by livestock, and turned into stored beef energy.
-- The grain was harvested, pounded into flour, baked, and turned into stored bread energy.
-- The hops were harvested, soaked, and turned into stored beer energy.
-- Johannes Brahms ate beef, which his body turned into brain and muscle energy. Ludwig van Beethoven drank beer, which his body turned into energy and inspiration. John Phillip Sousa ate bread, which his body turned into leg energy to march with.
-- All of these individuals, and a lot of others, composed music which nobody had ever heard before, using the solar energy they absorbed from the stuff that they ate and drank.
Music is created through the transformation of energy, initially sourced from the Sun, which facilitates the growth of materials for instruments and provides the dynamics of the Earth's atmosphere that may inspire composition.
Music involves a complex interplay of energy transformations. When the Sun shines on Earth, it energizes various elements of our planet, such as sand and water, which in turn affect the atmospheric system and contribute to phenomena like the sea breeze. This is a simple analogy of how energy flows and changes forms, which is a foundational concept in music creation.
The energy from the Sun can also be seen as initiating a sequence of events that leads to the production of music. For instance, solar energy is crucial for the growth of materials like wood, which are used to make stringed instruments. When played, these instruments convert mechanical energy of vibration into sound energy, which we perceive as music. Even the energy and inspiration derived by musicians to compose and play their instruments can be traced back to the Sun, as it sustains life on Earth and stimulates the sensory experiences that influence creativity.
Consequently, exploring the mass-energy relationship as proposed by Einstein involves understanding the conversion of mass into energy, similar to how the energy of a vibrating guitar string is converted into audible sound. This concept also applies to the environmental temporality and interrelated energy fluctuations that inspire certain musical compositions, reflecting the intricate bonds between our environment, energy, and the music we create.
A student performed an experiment to test the acidity of foods. Put the following steps in the order they should occur. The student records the acidity of the food. asks a question about food’s acidity. obA student performed an experiment to test the acidity of foods. Put the following steps in the order they should occur.
The student
records the acidity of the food.
asks a question about food’s acidity.
observes that there are acidic foods.
presents the results to the class.
prepares to conduct the experiment.
creates a hypothesis about the acidity.
serves that there are acidic foods. presents the results to the class. prepares to conduct the experiment. creates a hypothesis about the acidity.
Answer:
Steps in the order they should occur:
Observes that there are acidic foodsAsks a question about food’s acidityCreates a hypothesis about the acidityPrepares to conduct the experimentThe student records the acidity of the food.Presents the results to the classExplanation:
This question is addressed to reflect on the scientific method, and so it deals with the logical steps that are followed regularly in such process.
It is the observation of a natural phenomenum what sparks the whole process. In this case, the student observes that there are acidic foods.
After such observation, some minds, the curious minds, start to ask questions: why?, how?, when?, what happens if? Numerous questions might arise, it is the curiosity attitude, that accompanies the scientific mind. So, the student asks a question about food’s acidity.
The trained scientist then elaborate a hypothesis : a logical tentative prediction which relates a thesis and a conclusion, in the form if _________ then ________, addresed to answer the question. This hypotheisis must be testable, so it must contains objective variables, which can be verified through an experiment by measurements that can be replicated by any one. So, at this point fhe student creates a hypothesis about the acidity.
The next steps are:
Prepares to conduct the experiment: the student must select the independent, dependent and control variables, and plan the materials and equipment needed, the place, the time, the budget, and the special conditions to perform the experiment.The student records the acidity of the food: the experiment is run and the data is recorded, and analyzed, to drive a conclusion:Presents the results to the class: this is how science evolve. The presentation of the results is important because 1) permits the validation of the results by the community, and 2) permits that other scientist use the results to continue with the process, start with a new question, and, might be, to validate a theory or create a new one.In ORDER:
5,2,1,6,4,3
Can someone tell me how to find acceleration with only using distance and time? It would be much appreciated
AS S =Vit +1/2 at²
Vi = 0 (as initially an object is at rest when it starts motion)
som
S = 1/2 at²
2S/t² =a ( from this we can find acceleration)
A car travels in a straight line for 4.1 h at a constant speed of 95 km/h . What is its acceleration? Answer in units of m/s 2 .
Acceleration is a change in speed, so if the car has a constant speed then it's acceleration is 0m/s^2.
Since the car is moving at a constant speed, there's no change in velocity, therefore, the acceleration is 0 m/s^2.
Explanation:The acceleration of an object is a measure of how quickly its velocity changes. In the question provided, the car is moving at a constant speed for a certain amount of time, indicating that there is no change in velocity.
As acceleration is the rate of change of velocity with time, if there is no change in velocity, it follows that the acceleration is zero. Hence, the acceleration of the car, in units of m/s2, would be 0 m/s2.
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What will be the displacement of this spring if the load is 4n with a constant of 5n\m
As we have formula for mass spring system
F= kx ( where k is spring constant , x is displacement , F is the force acting due to load)
To find =x
So x=F/k
x= (4N) / (5N/m)
x= 0.8 m
I need help understanding this physics question on my homework. Could someone help?
Romeo is throwing pebbles gently up to Juliet's window, and he wants the pebbles to hit the window with only a horizontal component of velocity. He is standing at the edge of a rose garden h = 9.8 m below her window and L = 9.7 m from the base of the wall.
How fast are the pebbles going when they hit her window?
Express your answer to two significant figures and include the appropriate units.
since Romeo throw the pebble from the ground at a position 9.8 m below the window and at horizontal distance of L = 9.7 m
It is given that he throw the pebble such that it hit the window only with horizontal speed.
So here vertical speed of the pebble will become zero as it hit the window
[tex]v_f^2 - v_i^2 = 2 a h[/tex]
so here we know that in y direction
[tex]v_f = 0[/tex]
[tex]a = - 9.8 m/s^2[/tex]
[tex]h = 9.8 m[/tex]
now we will plug in all values
[tex]0 - v_i^2 = 2*(-9.8)(9.8)[/tex]
[tex]v_i = 13.8 m/s[/tex]
also the time taken by the pebble to reach the window is given by another equation
[tex]v_f = v_i + at[/tex]
[tex]0 = 13.8 - 9.8*t[/tex]
[tex]t = 1.41 s[/tex]
now in the same time if stone reached the horizontal distance of L = 9.7 m so we can find its horizontal speed as
[tex]v_x = \frac{L}{t}[/tex]
[tex]v_x = \frac{9.7}{1.41}[/tex]
[tex]v_x = 6.9 m/s[/tex]
so the speed of the pebble will be 6.9 m/s when it will hit the window
Final answer:
To find the pebbles' impact velocity at Juliet's window, we used the time to fall the height of 9.8 meters to calculate the necessary horizontal velocity. The calculated horizontal impact velocity is 6.9 m/s.
Explanation:
Calculating Pebble's Velocity at Juliet's Window
To find the horizontal velocity with which Romeo's pebbles hit Juliet's window, we need to consider the pebbles' horizontal displacement (L) and vertical displacement (h). Since there is no acceleration horizontally, the horizontal component of velocity will remain constant throughout the motion. However, vertical motion is influenced by gravity, with a downward acceleration of 9.8 m/s2 (the value of gravitational acceleration).
We first calculate the time (t) it takes for the pebble to fall 9.8 meters using the equation for vertical motion:
1/2 × g × t2 = h
Substituting g = 9.8 m/s2 and h = 9.8 m, we find: 1/2 × 9.8 m/s2 × t2 = 9.8 m thus, t2 = 2 and t = √2 ≈ 1.41 s
Using the time it takes to reach Juliet's window, we can calculate the horizontal velocity (vx) needed: vx = L / t
Substituting L = 9.7 m and t ≈ 1.41 s, we get: vx = 9.7 m / 1.41 s ≈ 6.88 m/s
To two significant figures, the horizontal velocity with which the pebbles hit Juliet's window is 6.9 m/s.
What step of the rock cycle happens as the sea stacks are broken down
But rocks are not unchangeable! Just like the water cycle, rocks undergo changes of form in a rock cycle. A metamorphic rock can become an igneous rock, or a sedimentary rock can become a metamorphic one. Unlike the water cycle, you can’t see the process happening on a day-to-day basis. Rocks change very slowly under normal conditions, but sometimes catastrophic events like a volcanic eruption or a flood can speed up the process. So what are the three types of rocks, and how do they change into each other? Keep reading to find out!
Just like the water cycle, rocks undergo changes of form in a rock cycle. A metamorphic rock can become an igneous rock, or a sedimentary rock can become a metamorphic one. Unlike the water cycle, you can’t see the process happening on a day-to-day basis. Rocks change very slowly under normal conditions, but sometimes catastrophic events like a volcanic eruption or a flood can speed up the process. So what are the three types of rocks, and how do they change into each other? Keep reading to find out!
A person weighs 764 n on the surface of earth and 5320 n on the surface of another planet. What is the acceleration due to gravity on the other planet?
weight of person on earth = 764 N
mass ?
w=mg (g =9.8m/s²)
m = w/g
m= 764/9.8
m= 77.9 kg
Weight of person on other planet =5320 N
w=mg
g =w/m
g= 5320 / 77.9
g =68.3 m/s² ( acceleration due to gravity on other planet)
The 'weight' of an object depends directly on the acceleration of gravity in the place where he happens to be.
This guy weighs 764N on Earth, and 5320N where he is now. So wherever he is now, the acceleration of gravity there is (5320/764) = 6.96 times the acceleration of gravity on Earth.
The acceleration of gravity on Earth is 9.81 m/s², so it's (9.81 x 6.96) = 68.3 m/s² on the surface of the mystery planet where he is now.
==========================================
Note: The biggest, heaviest, most massive object in the solar system ... except for the sun itself ... is the planet Jupiter, where the acceleration of gravity is 24.8 m/s².
On the planet where our man has landed, gravity is 2.75 times as strong as on Jupiter, and about 1/4 as strong as on the Sun itself. He weighs almost 1200 pounds there. He certainly can't walk around, and he probably won't be able to lift off in his rocket either.
Different ______ of an element have different numbers of electrons
Different isotopes of an element have different numbers of electrons.
Explanation:Isotopes are atoms of the same element that have different numbers of neutrons. Since the number of electrons in an atom is equal to the number of protons in the nucleus, isotopes with different numbers of neutrons will have different overall numbers of electrons. For example, carbon-12 and carbon-14 are isotopes of carbon, and carbon-12 has 6 electrons while carbon-14 has 8 electrons.
Isotopes are variants of chemical elements with the same number of protons but different numbers of neutrons. They have various practical applications. For example, radioactive isotopes are used in medicine for imaging and cancer treatment, while stable isotopes are used in tracing chemical reactions, dating archaeological artifacts, and studying geological and environmental processes.
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A student is going to produce static charge in a glass rod by rubbing it with a piece of silk. Which method of transferring charge is being described?
a) conduction
b) friction
c) induction
The correct answer to the question is : Friction.
EXPLANATION:
Before answering this question, first we have to understand the process of charging a body by friction.
There are generally three modes of charging a body which are known as friction, induction and conduction respectively.
Friction: Friction is the mode of charging a body by direct contact through rubbing with another substance.
In this process, a low electron affinity substance is rubbed with a high electron affinity substance. The low electron affinity substance will lose electron, and acquires positive charge.
On the other hand, the high electron affinity substance will gain electrons, and gets negatively charged .
Hence, there is actual transfer of electrons from one body to another body in the process of charging a body through friction.
As per the question,the glass rod is rubbed with silk. Due this rubbing,static electricity will be developed on the glass rod and silk.
Hence, it is obvious that the glass rod gains static charge due to the process of friction.
Answer:
The correct answer is most likely b) friction
Explanation:
PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
While performing an experiment, the student creating the data table is not sure if a measurement from the experiment is a vector or scalar. Which question should she ask to determine if a measurement is a vector or a scalar?
The correct answer is:
Does the measurement include direction?
In fact, the basic difference between a scalar and a vector is that a scalar does not have a direction (it only has a magnitude), while a vector has both magnitude and direction. Therefore, if the answer to this question is "yes", it means the quantity is a vector, otherwise it is a scalar.
What is the wavelength in nm of a light whose first order bright band forms a diffraction angle of 19.0°, and the diffraction grating has 600.0 lines per mm?
Answer:
What is the wavelength in nm of a light whose first order bright band forms a diffraction angle of 19.0°, and the diffraction grating has 600.0 lines per mm?
543 nm
Explanation:
The wavelength in nm of a light whose first order bright band forms a diffraction angle of 19.0° is 543 nm.
What is wavelength?The wavelength is the distance between the adjacent crest or trough of the sinusoidal wave.
Using Huygen's principle of light, we have an expression
nλ =d sinθ
where, n is the order of maximum
λ is the wavelength of light
d is the distance between the lines on diffraction grating
θ is the angle.
The distance between the lines on diffraction grating is
d = 1 / (600 x 1000) or 0.00000167 m
For first order bright band, n = 1
Then, the wavelength will be
1 x λ = 0.00000167 x sin19.0°,
λ = 0.000000543 m
λ = 543 nm
Thus, the wavelength of the first order bright band is 543 nm .
Learn more about wavelength.
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Dewayne reviews Kepler’s laws by making the table shown. Which label belongs in each cell of the table?
W: The orbital period is related to the average distance from the Sun.
X: Orbit are ellipses with the Sun at a focus.
Y: A planet sweeps out equal areas in equal time frames as it orbits the Sun.
Choices:
A. W: First
X: Second
Y: Third
B. W: Third
X: Second
Y: First
C. W: Third
X: First
Y: Second
D. W: Second
X: Third
Y: First
There are three laws which are postulated by Kepler for planetary motion.
Kepler's first law: As per the first law of Kepler,the orbits of planets around the sun is elliptical in nature in stead of circular. The sun is situated always at one of its foci.
Second law: Planets are moving in such a way that the areal velocity of the planets are constant i.e planets sweep out equal ares in equal interval of time.
Third law: The square of time period of planets around the sun is directly proportional to the cube of semi major axis.
[tex]Mathematically\ T^{2} \alpha\ R^{3}[/tex]
where T is the time period and R is semi major axis.
Hence the correct answer to the question is C i.e third,first,second.
Explanation :
Kepler gives three laws of planetary motion :
First law :
First law is also known as the law of orbits. It states that all planets revolve in an elliptical orbit. The sun is present at one of its foci.
Second law :
Second law is also known as the law of areas. It states that draw a hypothetical line from the midpoint of the sun to the midpoint of the planet. This will sweep out the same areas in identical interval of time.
Third law :
This is also known as the law of periods. It states that the square of the orbital time period (T) is directly proportional to the cube of semi-major axis (a).
i.e. [tex]T^2\propto a^3[/tex]
So, Correct labeling is :
W: Third law
X: First law
Y: Second law
Hence, the correct option is (C).
Our Sun is a_________ star.
A) Low-temperature
B) High-temperature
C) Medium-temperature
Answer:
high temp star.
Explanation:
this is the correct answer on my odyssey ware
A robot is exploring charon, the dwarf planet pluto's largest moon. Gravity on charon is 0.278 meters per second [m divided by s squared]. During its investigations, the robot picks up a small spherical rock for inspection. The rock has a diameter of 6 centimeters [cm] and is lifted 15 centimeters [cm] above the surface. The specific gravity of the rock is 10.8. The mechanism lifting the rock is powered by a 10-volt [v] power supply and draws 1.83 milliamperes [ma] of current. It requires 12 seconds [s] to perform this lifting task. What is the efficiency of the robot
In order to find the efficiency first we will find the Change in Potential energy of the small stone that robot picked up
First we will find the mass of the stone
As it is given that stone is spherical in shape so first we will find its volume
[tex]V = \frac{4}{3}\pi r^3[/tex]
[tex]V = \frac{4}{3}\pi *(\frac{0.06}{2})^3[/tex]
[tex]V = 1.13 * 10^{-4} m^3[/tex]
Now it is given that it's specific gravity is 10.8
So density of rock is
[tex]\rho = 10.8 * 10^3 kg/m^3[/tex]
mass of the stone will be
[tex]m = \rho V[/tex]
[tex]m = 10.8* 10^3 * 1.13 * 10^{-4}[/tex]
[tex]m = 1.22 kg[/tex]
now change in potential energy is given as
[tex]\Delta U = mgH[/tex]
here
g = gravity on planet = 0.278 m/s^2
H = height lifted upwards = 15 cm
[tex]\Delta U = 1.22* 0.278 * 0.15[/tex]
[tex]\Delta U = 0.051 J[/tex]
Now energy supplied by internal circuit of robot is given by
[tex]E = Vit[/tex]
V = voltage supplied = 10 V
i = current = 1.83 mA
t = time = 12 s
[tex]E = 10* 1.83 * 10^{-3} * 12[/tex]
[tex]E = 0.22 J[/tex]
Now efficiency is defined as the ratio of output work with given amount of energy used
[tex] \eta = \frac{\Delta U}{E}*100[/tex]
[tex]\eta = \frac{0.051}{0.22} = 0.23[/tex]
so efficiency will be 23 %
Can someone answer these?
22. The free body diagram would not apply to the woman jumping off the floor as she would not be experiencing any normal force as she is airborne.
23. For the box to be moving with constant speed, it would mean that there is no acceleration. That also means that there would be no net force in the axis that the box is being pushed in. So the applied force, F, would have to equal the frictional force f.
24. First determine the weight of the sphere due to gravity:
F = ma
F = (175)(-9.8)
F = -1715N
Now, assuming the tension is from the top of the chain (because it's the only logical reason I can deduce as why the mass of the chain was given), you would have to find the weight of the chain due to gravity as well:
F = ma
F = (12)(-9.8)
F = -118N
The chain has to not only support the weight of the sphere, but also the weight of the chain itself, so the tension force is equal to the sum of the weights of both the sphere and the chain.
(1715)+(118) = 1833N (Value is positive because tension acts in the direction opposite to the force it is withstanding)