slope= Force/Mass
force is measured in Newtons (N) and mass in kilograms (kg). This means that the units of the slope are N/kg. However a Newton is also equal to one kg*m/s2, so if we divide this by one kg we are left with a slope with units m/s2, which acceleration is measured in!
Which of these would be a good model to demonstrate the fact that the galaxies are moving apart as the universe is expanding?
A) The spots on the balloon move away as the balloon is inflated
B) Dust particles move around in random directions
C) Pieces of paper scatter in random directions in the wind
D) Cars travel down a highway in forward motion.
Answer: Option A: The spots on the balloon move away as the balloon is inflated.
one of the scientific models describes the galaxies are moving apart as the universe is expanding. This expansion theory came from the observation of red-shifted spectrum from all the directions indicating that the galaxies are moving away. This can be understood from the inflated balloon. Initially spots can be marked using a colored pen on the balloon.On inflating the balloon, it would be noticed that the spots on the balloon move away. Actually the position of the spots won't change, but the distance between the spots would expand. This is a good model to explain the expanding universe. The galaxies are neither moving in any random direction nor moving forward. So, rest of the options are not good models to explain the theory.
A .25 kg ball initially at rest is hit with a 460 N impact. What is the time of impact for this event if the ball ends up moving 40 m/s
Time of impact: [tex]\(0.0217\)[/tex] seconds, calculated using impulse-momentum theorem with force [tex]\(460 \, \text{N}\) and mass \(0.25 \, \text{kg}\)[/tex].
To find the time of impact, we can use the impulse-momentum theorem, which states that the impulse experienced by an object is equal to the change in momentum of the object. Mathematically, it can be expressed as:
[tex]\[ J = \Delta p \][/tex]
Where:
- [tex]\( J \)[/tex] is the impulse
- [tex]\( \Delta p \)[/tex] is the change in momentum
The impulse [tex](\( J \))[/tex] can be calculated using the force [tex](\( F \))[/tex] and time [tex](\( \Delta t \))[/tex] of impact:
[tex]\[ J = F \cdot \Delta t \][/tex]
Given that the force [tex](\( F \))[/tex] is 460 N, we can rearrange the equation to solve for the time ([tex]\( \Delta t \)[/tex]):
[tex]\[ \Delta t = \frac{J}{F} \][/tex]
The change in momentum ([tex]\( \Delta p \)[/tex]) can be calculated using the mass [tex](\( m \))[/tex] and the final velocity (\( v_f \)) of the ball:
[tex]\[ \Delta p = m \cdot v_f \][/tex]
Given that the mass [tex](\( m \))[/tex] is 0.25 kg and the final velocity [tex](\( v_f \))[/tex] is 40 m/s, we can substitute these values into the equation to find the change in momentum.
Once we have both the impulse [tex](\( J \))[/tex] and the change in momentum [tex](\( \Delta p \))[/tex], we can solve for the time of impact [tex](\( \Delta t \))[/tex].
Let's calculate:
[tex]\[ \Delta p = m \cdot v_f = 0.25 \, \text{kg} \times 40 \, \text{m/s} = 10 \, \text{kg} \cdot \text{m/s} \][/tex]
[tex]\[ \Delta t = \frac{J}{F} = \frac{10 \, \text{kg} \cdot \text{m/s}}{460 \, \text{N}} \][/tex]
[tex]\[ \Delta t = \frac{10}{460} \, \text{s} \][/tex]
[tex]\[ \Delta t[/tex] ≈ [tex]0.0217 \, \text{s}[/tex]
So, the time of impact for this event is approximately [tex]\( 0.0217 \)[/tex] seconds.
What formula gives the strength of an electric field, E, at a distance from a known source change?
A) E= Fe/qd
B) E= kq/d
C) E= kq/d^2
D) E= Fe/d
C) E= kq/d^2
Hoped this helped
Answer:
The correct answer option is C. E = kq / d^2
Explanation:
Electric field strength is a vector quantity which means it has both the magnitude and a direction.
It can be defined as the strength of electrical force per unit charge at any given point in the electric field and can be denoted by E.
Therefore, the formula for the electric field strength is:
E = [tex]\frac{k .Q }{d^2} [/tex]
Hello I need help! Don't have to say the answer, I just want to know how to solve it or the formula pretty please! Thanks
A camera falls from a blimp that is 568 m
above the ground and rising at a speed of
10.6 m/s.
Find the maximum height reached by the
camera with respect to the ground. The acceleration
of gravity is 9.8 m/s^2.
Answer:
Maximum height reached = 573.73 m
Explanation:
We have equation of motion, [tex]v^2=u^2+2as[/tex], where u is the initial velocity, u is the final velocity, s is the displacement and a is the acceleration.
Here final velocity = 0 m/s at maximum height, initial velocity = 10.6 m/s, acceleration = acceleration due to gravity = [tex]-9.8m/s^2[/tex]
Substituting
[tex]0^2=10.6^2-2*9.8*s\\ \\ s=5.73 m[/tex]
So camera travels 5.73 m above after falling from blimp.
Maximum height reached = Initial height + 5.73 = 568+5.73 = 573.73 m
Household Paint Is it a pure substance or a mixture and why
A 300 g ball and a 100 g ball are dropped from a tower. Both balls are the same size and there is no air resistance. Which one hits the ground first?
If there is no air resistance, then both of those balls ... as well as a feather, a piece of paper, a handkerchief, a bowling ball, a fried egg, a hammer, a car, a school bus, an airplane, a diesel locomotive, a computer, and a battleship ... if dropped at the same time from the same height, fall together, and hit the ground at the same time. We've known this for about 400 years, since Galileo.
According to Galileo's law of falling bodies, in a vacuum with no air resistance, all bodies fall at the same rate regardless of their mass. Therefore, both the 300g and 100g balls will hit the ground at the same time.
Explanation:The two balls, one weighing 300 grams and the other 100 grams, when dropped from a tower, will hit the ground at the same time. This is based on Galileo's law of falling bodies, which states that in a vacuum, where there is no air resistance, all bodies, no matter their mass, fall at the same rate. Therefore, the weight of the balls does not affect the time it takes for them to reach the ground.
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Physics Question, Please Help Me?
Which line in the graph might you obtain if an increase in x always produces a linear increase in y? A, B, or C?
Here's something I'll bet you never thought about before:
A function is called "linear" if it makes a straight line when you graph it.
There are three different functions on the graph you provided. The only one of them that's a "linear" function is line B .
The path followed by a projectile is called its _____.
A. projectile motion
B. projectile path
C. trajectory
D. path of motion
The path followed by a projectile is called its trajectory. (C)
In the most common school situation ... with gravity but without air resistance, the trajectory of a projectile is the shape of an inverted parabola (nose pointing up). That's the result of constant horizontal velocity and accelerated vertical velocity.
Answer:
Trajectory
Explanation:
Trajectory is the path followed or traced by a projectile.
It follows a parabola shape. That is the shape got in javeline.
this is a Physics worksheet. please help.
i think the answer is A
For the stunt car, additional measurement of the angle of projection and air resistance are required for accurate prediction. In the case of vector quantity of A, using Pythagorean theorem and trigonometric calculations, it would be 5cm at a certain angle according to the coordinate system.
The first question involves the physics of projectile motion. Based on the given parameters (height of the cliff, speed of the car leaving the cliff, and the mass of the car), the stunt coordinator still needs to collect more measurements.
The missing parameters are the angle at which the car leaves the cliff and the air resistance, which can be a major factor in the car's trajectory, particularly in a high-speed situation like this. Without these, it's impossible to accurately predict where the car will land.
As for the second question, which involves vector quantities, vector A’s magnitude can be realized by Pythagorian theorem.
Given that the x-component is 3 cm and the y-component is 4 cm, the magnitude of A is √(3² + 4²), which is 5 cm, providing a vector quantity of 5 cm at an angle. The specific angle depends on the orientation of the coordinate system but can be calculated using trigonometric functions.
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Match the rocks with the material they are made of.
Answer:
1st box: Sedimentary rocks
2nd box:metamorphic rock
3rd box: igneous rock
Explanation:
Sedimentary rocks are rocks formed from weathered pieces of rocks (sediments) which have accumulated over a period of time. An example of a sedimentary rock is limestone
Metamorphic rocks are rocks that have been reformed as a result of long term effects of high temperature and pressure. they can be said to ave changed or metamorphosed from their original state which could be igneous , sedimentary or even metamorphic. example is marble
igneous rocks are solidified hot molten magma which have become cooled after a period of time. An example is granite
The bar graph shows the population of male and female deer in a forest, measured in 10-year intervals. According to the graph, which of these statements is true about the trends?
Answer: option D. the ratio of the population of male deer is not constant.
Explanation:
The bar graph permits to compare the results for two different populations: male and female deer in a very easy visual way.
These features are remarkable:
This discards the option A, which states that the population of male deer increases each decade from 1961 to 2011.
This discards the option B. which states that when the polulation of male deer increases, the poluplation of female deer also increases.
Answer:
The answer is D
Explanation:
I got it right
Determine whether the material is a rock or mineral based on the description.
Description:
It often has molten appearance due to its heterogeneous composition.
Rock or mineral:
It is a rock.
Mineral has a unique specific makeup and always has the same composition.
So it is rock due to heterogeneous composition.
Part 2.Description:
Atoms in all specimens have the same structure and shape.
Rock or mineral:
It is Mineral.
Mineral has a unique specific makeup and always has the same composition.
Part 3.Description:
It is generally found in crystalline form.
Rock or mineral:
It is a mineral.
Part 4.Description:
Every specimen varies in terms of atomic structure.
Rock or mineral:
It is a rock.
A rock is a solid, inorganic, naturally-formed substance without a particular atomic structure or chemical composition.
carbon monoxide pure substance or mixture and why
what happens when you add heat to a substance ?( think of the kinetic theory of matter)
When 2 grams of hydrogen (h2) react with 32 grams of oxygen (O2) the reaction yields hydrogen peroxide (h2o2) how many grams of ho202 are produced in this reaction
as per the reaction we have
[tex]H_2 + O_2 ---> H_2O_2[/tex]
so here 1 mole of H2 react with 1 mole of O2 and give 1 mole of H2O2 as the product
now we will find the moles of given reactant
moles of H2
[tex]n_1 = \frac{2}{2} = 1 mole[/tex]
moles of O2
[tex]n_2 = \frac{32}{32} = 1 mole[/tex]
so here both present in 1 mole each hence the product will also formed 1 mole
so here we have
[tex]n = 1 mole[/tex] H2O2 will form
so mass of the product
mass = moles* molecular mass
[tex]m = 1 * (2 + 32)[/tex]
[tex]m = 34 g[/tex]
so the product mass will be 34 g
Modern atomic theory states that the atom is a diffuse cloud surrounding a small, dense nucleus. Identify which particle is in the nucleus. A) ion b) proton c) electron d) free radical
b) proton
the proton is the only one of these that are in the nucleus. if you think the electron is, its not; the electrons are all outside the nucleus in the electron cloud. :)
HURRY PLS!!! Carla draws two circuit diagrams that connect the same components in different ways, as shown. Which statements about the circuits are correct? Check all that apply.
Circuit A is a series circuit.
Circuit B is a series circuit.
The bulbs in Circuit A shine brighter than those in Circuit B.
The total resistance in Circuit A is greater than that in Circuit B.
When a bulb in Circuit B goes out, the other bulbs go out.
When a bulb in Circuit A goes out, the other bulbs keep shining.
A series circuit is a closed circuit in which the current follows in only one path. In a series circuit, the current through each load is the same and the total voltage across the circuit is the sum of the voltages across each load. If one component of a series circuit becomes nonfunctional, the rest of components do not work. So the circuit A is a series circuit.
Explaining the second statement :
Each resistor in a series circuit has the same amount of current flowing through it, whereas the current flowing through each resistor in a parallel circuit is different, depending on the resistance. So we can say that when resistors are connected in parallel, more current flows from the source than flow for any of them individually, so the total resistance is lower.
Series circuit has the summation of all resistances. Therefore, Circuit A is a series circuit, and also the total resistance in Circuit A is greater than that in Circuit B.
What is an Electrical circuit?The combination of various electrical components in a definite form, to allow the flow of electric current through it, is known as an electrical circuit.
Given data -
Carla draws two circuit diagrams that connect the same components in different ways.
A series circuit is a closed circuit in which the current follows in only one path. In a series circuit, the current through each load is the same and the total voltage across the circuit is the sum of the voltages across each load. If one component of a series circuit becomes nonfunctional, the rest of the components do not work. So circuit A is a series circuit.
The resistors in a series circuit have the same amount of current flowing through it, whereas the current flowing through each resistor in a parallel circuit is different, depending on the resistance. When resistors are connected in parallel, more current flows from the source than flow for any of them individually, so the total resistance is lower.
Thus, we can conclude that Circuit A is a series circuit, and also the total resistance in Circuit A is greater than that in Circuit B.
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Larry and Balky set up an experiment to analyze the motion of a marble as it rolled down an incline. They started the marble at the top of the ramp and set up photogates to collect data as the marble rolled down the ramp.
Which graph format will allow Larry and Balky to calculate instantaneous accleration from the slope of the graph?
A) Velocity on the y-axis, time on the x-axis
B) Distance on the y-axis, time on the x-axis
C) Time on the x-axis, distance on the y-axis
D) Velocity on the y-axis, distance on the x-axis
Answer:
Option A is the correct answer.
Explanation:
The instantaneous acceleration = Change in velocity in velocity/Time taken
The slope of the graph should give instantaneous acceleration.
Slope of a graph = Change in value of Y -axis / Change in values of X -axis
Comparing both the equations
Change in value of Y -axis = Change in velocity in velocity
Change in values of X -axis = Time taken
So velocity values should be on the Y axis and Time values should be on the X axis.
Option A is the correct answer.
A) Velocity on the y-axis, time on the x-axis
How was the age of the Earth determined? (site 1)
In baseball, a home run means the batter has hit the baseball into the stands, beyond the baseball field. Compare the force of the batter when bunting the ball into the in-field versus hitting a grand slam.
The force is much less when bunting into the in field.
Answer:
The force is much less!
Explanation:
carbon monoxide pure substance or mixture and why
A person throws tennis ball 6m/s straight up. How long does it take for it to come back to their hand?
What kinds of birds visits you a feeder at different times a year
Purple finches, chickadees,cardinals,blue jays,woodpeckers,red polls,juncos,goldfinches,and red crossbills.
What happens to the magnetic field of a wire when you change the direction of the current of the wire
for this velocity-time graph in which time interval is the object moving toward the reference point?
A. 7 to 11 s
B. 0 to 6 s
C. 11 to 20 s
D. 6 to 7 s
Answer:
D. 6 to 7 s
Explanation:
When object is moving away from its reference point then its motion is known as positive motion
And when object moves towards the reference point then its motion is termed as negative motion because here the distance with respect to reference point is decreasing with time
so by the graph we can say that
object velocity is positive between
t = 0 to t = 6 s and t = 12 to t = 20 s
so in above interval of time it is moving away
while during time interval of t = 6 s to t = 7 s the motion its velocity is negative and hence it will move towards reference point
Kate gathered three boxes of the same size made of different materials: glass, clear plastic, and aluminum painted black. She placed them on a windowsill in the sun for an hour and then measured the warmth of the air in each box. In this experiment, the warmth of the air is a(n) _____________.
A
Independent variable
B
Constant
C
Control
D
Dependent Variable
35 m is equivalent to how many km? 0.035 km 35000 km 35000 km 0.0035 km
Meter is standard unit for measurement of length. Larger unit used for measurement of length is Kilometer.
Since,
1 Kilometer= 1000 meter
or
1 meter = 1/1000 Kilometer
therefore,
35 meter = 35/1000 Kilometer
35 meter = 0.035 Kilometer
35 m is equivalent to 0.035 km.
35 meters is equivalent to 0.035 kilometers, which is found by dividing the number of meters by 1000.
To convert meters to kilometers, you need to know the basic conversion rate: 1 kilometer (km) is equivalent to 1000 meters (m). Therefore, to convert meters to kilometers, you divide the number of meters by 1000.
35 meters is equivalent to 0.035 kilometers because:
35 m / 1000 = 0.035 km
None of the other options (35000 km, 35000 km, 0.0035 km) are correct. The correct conversion is to simply divide the number of meters by 1000 to get the kilometers.
PLZ help!
Which vector should be negative?
Question 1 options:
any vector whose magnitude is greater than 1
any vector whose magnitude is less than 1
the velocity of a falling object
a displacement in the direction North
Question 2 (1 point) Question 2 Unsaved
A worker pushes a large rock to the north while another worker helps by pushing it to the east. If they both exert equal force, in what direction does the rock move?
Question 2 options:
northeast
southwest
north
east
Question 3 (1 point) Question 3 Unsaved
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:
224 km
200 km
300 km
173 km
Question 4 (1 point) Question 4 Unsaved
A runner traveled 15 kilometers north then backtracked 11 kilometers south before stopping. His resultant displacement was
Question 4 options:
4 kilometers south
26 km south
26 km north
4 kilometers north
4 Kilometers, North, would be the answer.
Which type of circuit is a continuous loop that allows the flow of current along its intended path?
A) open
B) inverted
C) closed
D) short
A C) closed circuit is a continuous loop that allows the flow of current along its intended path.
A continuous loop that allows the flow of current along its intended path is closed circuit. The correct option is C.
What is circuit?A circuit consists of a voltage source along with resistors and the current flows from positive to the negative terminal of the battery.
When the circuit is open , there will be no current flowing in the circuit, but if closed, there will be continuous flow of current.
Thus, the correct option is C.
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Two dimensional motion is not always projectile motion. In two dimensional motion that is not projectile motion, what is not accelerating the object
gravity is the correct answer.
In two-dimensional motion that is not projectile motion, the object may experience acceleration due to various forces acting on it. Projectile motion is a specific case where the only significant force acting on the object is the force of gravity, resulting in a distinct motion trajectory.
Projectile motion refers to a specific type of two-dimensional motion in which an object is launched into the air and moves under the influence of gravity alone, experiencing no forces other than gravity. In this case, the object's motion is characterized by a constant horizontal velocity and a vertical acceleration due to gravity.
However, in other two-dimensional motions where the object is not a projectile, there may be other forces acting on it, causing it to accelerate in various directions. Some examples of forces that can cause acceleration in two-dimensional motion include:
Applied Forces: If an external force is applied to the object, it will accelerate in the direction of that force. For example, pushing a box across the floor or throwing a ball horizontally.
Frictional Forces: Friction opposes the relative motion between two surfaces in contact. It can cause acceleration in the opposite direction to the motion, reducing the object's speed.
Tension: In systems with ropes or strings, tension can cause an object to accelerate in the direction of the net force.
Electrostatic Forces: If the object carries an electric charge and is in the vicinity of other charged objects, electrostatic forces may cause it to accelerate.
Magnetic Forces: If the object is influenced by magnetic fields, magnetic forces can cause it to accelerate in specific directions.
Spring Forces: In systems involving springs, the compression or stretching of the spring can cause acceleration in the object attached to it.
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