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?
two strong permanent magnets are placed one inch apart. which two fundamental forces will most affect them.
Weak and gravity
Strong and electromagnetic
Gravity and strong
Electromagnetic and gravity
An object is transported from Earth to deep space, far from any stars or planets. What happens to the mass and weight of the object?
Both the weight and mass of the object change.
Neither the weight nor the mass of the object change.
The weight of the object changes, the mass stays the same
The mass of the object changes, the weight stays the same
When two permanent magnets are placed adjacent to each other then they will exert magnetic force on each other.
There are four fundamental forces in nature
1. Gravitational force
2. Electromagnetic force
3. Weak Nuclear force
4. Strong nuclear force
So here magnets will exert two fundamental forces on each other Electromagnetic force and Gravity
#2
mass is defined as the composition or amount of substance while we can define weight as gravitational force of earth of the given object
Now when we transport an object from surface of earth to space far away from any planet then the amount of substance or mass will not change while the weight of the substance will decrease to zero because there is no gravity at this position
So we can say
mass = constant and will remain same
Weight = mass * gravity = 0
The weight of the object changes, the mass stays the same
The electromagnetic and gravitational forces are what affect two permanent magnets placed an inch apart, with electromagnetism being the stronger influence. If an object is moved to deep space, its weight changes due to reduced gravity, but its mass remains constant.
Explanation:When two strong permanent magnets are placed one inch apart, the two fundamental forces that will most affect them are electromagnetic and gravity. The electromagnetic force is responsible for the interaction between the magnetic fields of the magnets, causing them to attract or repel each other depending on their poles. Despite being a very weak force in comparison, gravity also acts upon the magnets, although its effect is negligible compared to the electromagnetic force.
In the case of an object transported from Earth to deep space, the weight of the object changes, but the mass stays the same. Weight is the force exerted on an object by gravity, which would decrease significantly far from any stars or planets. However, mass is a measure of the amount of matter in an object, which remains constant regardless of location.
uppose you have a container filled with iron and sand. You can separate the iron from the sand if you ____________ so this is a _________.
The largest number of neurons within the brain and spinal cord are responsible for the central nervous system's complex internal communications and intervene between inputs and outputs. These are the _____.
Answer: Interneurons.
These interneurons transmit impulses to other neurons and thus form a part of the reflux arc.
A fisherman is fishing from a bridge and is using a "42.0-N test line." In other words, the line will sustain a maximum force of 42.0 N without breaking. What is the weight of the heaviest fish that can be pulled up vertically, when the line is reeled in (a) at constant speed and (b) with an acceleration whose magnitude is 1.41 m/s2?
Answer:
(a) 42 N
(b)36.7 N
Explanation:
Nomenclature
F= force test line (N)
W : fish weight (N)
Problem development
(a) Calculating of weight of the heaviest fish that can be pulled up vertically, when the line is reeled in at constant speed
We apply Newton's first law of equlibrio because the system moves at constant speed:
∑Fy =0
F-W= 0
42N -W =0
W = 42N
(b) Calculating of weight of the heaviest fish that can be pulled up vertically, when the line is reeled with an acceleration whose magnitude is 1.41 m/s²
We apply Newton's second law because the system moves at constant acceleration:
m= W/g , m= W/9.8 , m:fish mass , W: fish weight g:acceleration due to gravity
∑Fy =m*a
m= W/g , m= W/9.8 , m:fish mass , W: fish weight g:acceleration due to gravity
F-W= ( W/9.8 )*a
42-W= ( W/9.8 )*1.41
42= W+0.1439W
42=1.1439W
W= 42/1.1439
W= 36.7 N
When the fishing line is reeled in at constant speed, it can support a fish with a weight of 42.0 N. But when there's an upward acceleration of 1.41 m/s², the line can only support a fish with a weight of about 33.7 N.
Explanation:The subject in question here relates to the physics topic of forces, specifically concerning gravitational pull and tension. Now, let's address the two cases.
(a) When the fisherman reels in the line at a constant speed, there is no acceleration. Therefore, the tension in the line equals the weight of the fish. If the line can withstand a force of 42.0 N, the maximum weight of a fish that the line can support is the same—42.0 N (remember that weight is a force measured in Newtons [N]).
(b) If the fisherman is reeling in the line with an upward acceleration of 1.41 m/s2, the tension in the line will be the weight of the fish (m*g, where m is the mass of the fish and g is the gravity 9.8 m/s2) plus the result of the mass and acceleration of the fish (m*a). So, the tension T can be expressed as:
T = m*g + m*a
Since the maximum tension that the line can withstand is 42.0 N, we can determine the maximum mass fish that can be caught. Let's let the maximum mass be 'M'.
Therefore:
42.0 N = M * 9.8 m/s2 + M * 1.41 m/s2
After calculating this, you'll find that M ≈ 3.44 kg. However, we require the weight, which can be calculated by multiplying the mass by gravitational pull - hence, ≈ 3.44 kg * 9.8 m/s2 = ≈ 33.7 N.
In conclusion, under constant speed, the fisherman can pull up a fish of approximately 42.0 N, but when accelerating, the bridge fishing line can only support a fish of about 33.7 N without breaking.
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The man who discovered that even individual light particles have wave characteristics was:
Newton
Christian
Taylor
Planck
Answer:
Taylor
Explanation:
Taylor found that with either high- or low-intensity light, a typical diffraction pattern was formed. Long exposure times were needed to develop the diffraction bands; one of the exposures needed three months to complete. With a series of photographic plates, he showed that even individual light particles, photons, have wave characteristics.
Answer:
Explanation:
Taylor lol
mini stereo speaker cables are made of copper wire surrounded by robert electricity travel down the copper portion of the cable while the rubber protects you from being zapped by the electricity which physical property explains the difference in ability of copper and rubber to transmit electricity
Here current is flowing through the copper wire so this shows that copper is good conductor of electricity.
It is having less resistance as it conducts the current easily
Now a rubber coating on it will protect us from electric shock
So this property shows that rubber is a bad conductor of electricity
It is having large electrical resistance due to which it will conduct no current
Rubber : - No transmittance of electricity
copper :- good transmittance of electricity
Copper is a good conductor of electricity due to its low electrical resistance, while rubber is an insulator that prevents the flow of electric charge. The copper portion of the cable carries the electrical current while the rubber surrounds and isolates it.
Explanation:Copper wire is a good conductor of electricity because it has a low electrical resistance, allowing electric charge to flow easily through it. This is due to the physical property of copper called low resistivity. On the other hand, rubber is an insulator and does not allow electric charge to flow through it easily due to its high resistivity. Rubber protects you from being zapped by electricity because it prevents the flow of electric charge, acting as a barrier. In a mini stereo speaker cable, the copper portion carries the electrical current while the rubber surrounds and isolates it.
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The elements that do not ordinarily form compounds are
The noble gasses, they are the elements on group 18 of the periodic table and do not usually form compounds. The noble gases are as follows: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).
Hope this helped :)
The elements that do not ordinarily form compounds are the noble gases. These gases are found in Group 18 of the periodic table and include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).
What is Noble gases ?Noble gases are extremely stable and inert, which means that under typical circumstances, they do not typically combine with other elements to produce compounds.
They are chemically stable because they have an entire outer electron shell. They are less likely to gain, lose, or share electrons with other atoms due to their entire outer electron shells, which is crucial for the formation of compounds.
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Three charges are located at the vertices of a triangle, as shown.
Which vector best represents the net force acting on the +4 C charge in the diagram?
A) W
B) X
C) Y
D) Z
The vector best represents the net force acting on the +4 C charge in the diagram is X. The correct option is B.
What is vector?A vector is the representation of a physical quantity in magnitude and direction.
A vector incline at an angle in has two components. On in x direction and other is in y direction.
Three charges are located at the vertices of a triangle, as shown.
The vector best represents the net force acting on the +4 C charge in the diagram is X.
Thus, the correct option is B.
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Calculate the acceleration of a bus whose speed changes from 6 m/s to 12 m/s over a period of 3s.
Final answer:
The bus's acceleration, calculated using the formula for acceleration (change in velocity over change in time), is 2 meters per second squared (2 m/s²).
Explanation:
To calculate the acceleration of a bus whose speed changes from 6 m/s to 12 m/s over a period of 3 seconds, we use the formula for acceleration (a), which is the change in velocity (Δv) divided by the change in time (Δt). The change in velocity is the final velocity minus the initial velocity. In this case, the final velocity (vf) is 12 m/s and the initial velocity (vi) is 6 m/s. Thus, Δv = vf - vi = 12 m/s - 6 m/s = 6 m/s. The change in time, Δt, is 3 seconds.
Now, we plug these values into the formula:
a = Δv / Δt = (12 m/s - 6 m/s) / 3 s
a = 6 m/s / 3 s
a = 2 m/s²
Therefore, the acceleration of the bus is 2 meters per second squared (2 m/s²).
Which scientist first discovered the white light is a mixture of a rainbow spectrum of light rays
Issac Newton
In the 17th century, Isaac Newton discovered that prisms could disassemble and reassemble white light, and described the phenomenon in his book Opticks. He was the first to use the word spectrum (Latin for "appearance" or "apparition") in this sense in print in 1671 in describing his experiments in optics.
Isaac Newton first discovered that white light is actually a mixture of different colored light rays, together forming the visible spectrum of a rainbow. therefore, option c is correct
Explanation:The scientist who first discovered that white light is a mixture of a rainbow spectrum of light rays is Isaac Newton. In the seventeenth century, Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. He conducted an experiment in which he allowed sunlight to pass through a small hole and then through a prism. Newton found that sunlight, which looks white to our eyes, is actually made up of a mixture of all the colors of the rainbow.
Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion. This view was later complemented by the wave theory of light when Thomas Young demonstrated the interference patterns, reconciling the particle and wave models of light into a more comprehensive dual theory known as the wave-particle duality.
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The complete Question is given below:
Which scientist first discovered that white light is a mixture of a rainbow spectrum of light rays?
a.James Watt
b.Marie Curie
c.Isaac Newton
d.Benjamin Franklin
e.Galileo Galilei
You walk 45 m to the north, then turn 90° to your right and walk another 45 m. How far are you from where you originally started?
A. 64 m
B. 41 m
C. 85 m
D. 45 m
A
This is a right triangle with legs 45 and 45 . Calculating the hypotenuse gives the distance from the starting point
let hypotenuse be h, then using Pythagoras' identity
h = √(45² + 45² ) = √4050 = 63.6396.. ≈ 64
What can we say about the rock as it falls to Earth?
A) It accelerates as it falls.
B) It falls at a constant rate of speed.
C) It is at a constant velocity as it falls.
D) It accelerates until it reaches a peak velocity, then decelerates.
7)
Which object is accelerating?
A) A lamp standing motionless on a desk.
B) A ball on a string whirled in a circle at a constant speed.
C) A car driving straight along a highway at a constant speed.
D) A humming bird hovering perfectly still in front of a flower.
8)
The difference between speed and velocity is that
A) speed is a vector and requires a direction.
B) speed is a vector and requires a magnitude.
C) velocity is a vector and requires a direction.
D) velocity is a vector and requires a magnitude.
9)
A unit of length in the metric system is the
A) kilogram.
B) kilometer.
C) liter.
D) milliliter.
10)
Which car is accelerating?
A) a car that is unmoving
B) a car that rounds a curve at a constant speed
C) a car that travels in straight line at a constant speed
D) a car that is set to a constant speed of 60 miles per hour
11)
A car starts from rest at a stop light and reaches 20 m/s in 3.5 s. Determine the acceleration of the car.
A) 3.5
m
s2
B) 5.7
m
s2
C) 20
m
s2
D) 70
m
s2
12)
You own a high speed digital camera that can take a picture every 0.5 seconds. You decide to take a picture every 0.5 seconds of your physics teacher as she drops a watermelon off the top of the school. After you develop and analyze the pictures, you realize that the distance the watermelon falls from the teacher in each new picture is
A) the same in each picture.
B) gradually less in each picture.
C) gradually more in each picture.
D) proportional to the mass of the watermelon.
13)
While running around the track at school, Milt notices that he runs due East on the 100m homestretch and due West on the 100m backstretch. To train for the 800m event, he runs both the 100m homestretch and the 100m backstretch in 12.2 seconds. How do Milt's velocities on the homestretch and backstretch compare?
A) The homestretch and backstretch have velocities with the same magnitude only.
B) The backstretch velocity is greater in magnitude than the homestretch velocity.
C) The home stretch velocity is greater in magnitude than the backstretch velocity.
D) The homestretch and the backstretch have velocities with the same direction and magnitude.
14)
Consider the average speed of a runner who jogs around a track four times. The distance (400m) remains constant for each lap. However, each lap is run 5 seconds slower than the first. The time for each lap increases. The average speed for each lap ______________. This is an example of a(n) _____________ relationship.
A) increases, direct
B) decreases, direct
C) increases, inverse
D) decreases, inverse
[1] When any body falls under gravity,the body will move in vertical downward direction towards the centre of earth under a constant acceleration called acceleration due to gravity .As per the question, the rock falls to earth.
Hence,the correct option to it is A] It accelerates as it falls.
7] When a body moves with constant speed in a circular path,it's direction changes continuously which leads to an acceleration.
Hence the correct answer to the question is C) A car driving straight along a highway at a constant speed.
8] Speed is a scalar quantity as it has only magnitude while velocity is a vector quantity as it has both magnitude and direction for its specification.
Hence,the correct answer to this question is C) velocity is a vector and requires a direction.
9]A unit of length in the metric system will be metre or its multiples.
Hence,the correct answer to the question is B) kilometer.
10] A car taking a round curve will experience an acceleration called centripetal acceleration which is required to keep the car along the circular curve.
Hence,the correct answer to the question is B) a car that rounds a curve at a constant speed
11]The initial velocity of car is u =0
The final velocity of car is v= 20 m/s
The time taken t= 3.5 s
From equation of kinematics we know that-
v=u+at
20=0×t+3.5a
[tex]a=\frac{20}{3.5} m/s^2[/tex]
[tex]a=5.71 m/s^2[/tex]
Hence,the correct answer to the question is B] 5.7.
12] Any body under free fall accelerates with acceleration due to gravity.
Hence,the correct answer to the question is C) gradually more in each picture.
13] Milt moves 100 m homestretch due east and 100 m backstretch due west.
The time taken by him is 12.2 seconds. The homestretch average velocity and backstretch average velocity are anti parallel to each other as they opposite in direction.
Hence the correct answer to the question will be the homestretch and backstretch have velocities with the same in their magnitude.
14]The distance given here is constant for each lap i.e 400 m.
It has been told that he is taking 5 seconds less in each lap.
We know that average speed is the ratio of total distance travelled to total time taken.As time is decreasing in each lap,so its average speed will be more for each lap.
Hence the correct answer to the question is C] increases and inversely.
The difference between speed and velocity is that
A) speed is a vector and requires a direction.
B) speed is a vector and requires a magnitude.
C) velocity is a vector and requires a direction.
D) velocity is a vector and requires a magnitude.
Which activity would be the best choice foir a lifelong fitness program
I think jogging/running/walking because you don't need any equipment and you can structure around it on your own time.
Answer:
I would say walking or running
Explanation:
Because its simple and you can choose your own pace
Constants Modern wind turbines are larger than they appear, and despite their apparently lazy motion, the speed of the blades tips can be quite high-many times higher than the wind speed. A turbine has blades 58 m long that spin at 14 rpm . At the tip of a blade, what is the centripetal acceleration?
It is given that the length of blade of the turbine is 58 m.
During the motion, the turbine will undergo rotational motion. Hence the radius of the circle traced by the turbine is equal to the length of the blade.
Hence radius r = 58 m.
The frequency of the turbine [f] =14 rpm.
Here rpm stands for rotation per minute.
Hence the frequency of the turbine in one second-
[tex]f=\frac{14}{60}\ s^-1[/tex]
[tex]f=0.23333 Hz[/tex]
Here Hz[ hertz] is the unit of frequency.
The angular velocity of the turbine [tex]\omega =2\pi f[/tex]
[tex]\omega=2*3.14*0.2333[/tex]
[tex]\omega=1.465124[/tex] radian/second
Now we have to calculate the centripetal acceleration of the blade.
Let the linear velocity of the blade is v.
we know that linear velocity v=ωr
The centripetal acceleration is calculated as-
[tex]a_{c} =\frac{v^2}{r}[/tex]
[tex]=\frac{[\omega r]^2}{r}[/tex]
[tex]=\omega^2r[/tex]
[tex]=[1.465124]^2 *58[/tex]
[tex]=124.5021234 m/s^2[/tex] [ans]
Centripetal acceleration depends on the rotational speed of object. The required value of the centripetal acceleration of the wind turbine blade is [tex]125.33 \;\rm rad/s^{2}[/tex].
What is centripetal acceleration?The magnitude of acceleration possessed by any object with rotational motion, such that the direction of acceleration is towards the center, then such acceleration is called centripetal acceleration.
Given data-
The length of the turbine blade is, r = 58 m.
The angular speed of blade is, N = 14 rpm.
Convert the angular speed into rad/s as,
[tex]\omega = \dfrac{2 \pi N}{60}\\\\\\\omega = \dfrac{2 \pi \times 14}{60}\\\\\omega =1.47 rad/s[/tex]
And the expression for the angular acceleration is given as,
[tex]\alpha = \omega^{2} \times r[/tex]
Solving as,
[tex]\alpha = 1.47^{2} \times 58\\\\\alpha =125.33 \;\rm rad/s^{2}[/tex]
Thus, we can conclude that the required value of the centripetal acceleration of wind turbine blade is [tex]125.33 \;\rm rad/s^{2}[/tex].
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A 5 N force pushes on the right side of a box . At the same time a 10 N force pushes in the left side of the box what happens to the box ?
The box will move 5n left because:
10-5=5
Then, you take the side that has the biggest number. In this case, 10n left > 5n right
As long as the friction force under the box is less than 5N, it'll accelerate to the right.
For this position-time graph, what is the average velocity for the entire curve?
A. -4 m/s
B. -10 m/s
C. +10 m/s
D. +4 m/s
The average velocity for the entire curve on a position-time graph can be found by calculating the slope between the initial and final points. In this case, the average velocity is -4 m/s.
The correct answer would be Option A: -4 m/s.
Explanation:To find the average velocity for the entire curve on a position-time graph, you can calculate the slope of the line connecting the initial and final points on the graph.
Identify the initial position and time on the graph.Identify the final position and time on the graph.Calculate the change in position by subtracting the initial position from the final position.Calculate the change in time by subtracting the initial time from the final time.Divide the change in position by the change in time to calculate the average velocity.In this case, it looks like the curve has a downward slope, so the average velocity would be negative. Based on the given answer options, the correct answer would be Option A: -4 m/s.
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Which electron dot diagram shows the bonding between 2 chlorine atoms? Image for option 1 Image for option 2 Image for option 3 Image for option 4
Answer:
B
Explanation:
Edge 2020
Can someone answer these please?
9. Force = mass * acceleration.
F = ma
(8) = (1)a
8m/s^2 = a
10. First solve for the kinetic energy of the vehicle:
Kinetic energy = (1/2)mass * velocity^2
KE = (1/2)(1200)(2)^2
KE = 2400J
Now use this value in the equation for work:
Since the car comes to a halt, the work is equal to the kinetic energy.
Work = Force * Displacement
W = Fd
(2400) = F(0.15) Remember to convert cm to m
1.6*10^4 N = F
9.
The 1N = 1kg * 1 m/s^2 has no influence on the answer.
F = 8 N
m = 1 kg
a = ??
F = m * a
8N = 1 kg * a
8N/1kg = a
a = 8 m/s^2
10
This is the beginning of a 2 step process. You are back to the basic 4 equations to find the acceleration. Then you can use F = ma
Givens
m = 1200 kg
vi = 2m/s
vf = 0
d = 15 cm = 0.15 m
Formula
F = m*a
vf^2 = vi^2 + 2 * a * d
0 = 2^2 + 2 * a * 0.15,
0 = 4 + 0.3 * a
- 4 = 0.3 * a
- 4 / 0.3 = a
- 13.3333333 = a
F = m * a
F = 1200 * (- 13.3333333)
F = - 16000 N
Comment (Extremely Important)
Why aren't any of the answers minus? It is because the minus represents the amount of force needed to stop the vehicle. But the question asks you about the rock. What is the rock experiencing? The rock is opposing the 0.15 m so the force it offers is in the opposite direction to that exerted by the vehicle.
a toy friction car is propelled forward from rest by a girl's hand which causes it to reach a forward velocity of 3.5m/s in 0.4 seconds. it is then rreleased and later stops in 5.6 seconds.
a) what is the acceleration with which the car speeded up?
b)what is the acceleration with which the car slowed down?
c) how far did the toy car travel?
Answer:
a) Acceleration = [tex]8.75m/s^2[/tex]
b) Slow down acceleration = 0.625[tex]m/s^2[/tex]
c) Car travels 9.8 m
Explanation:
Acceleration = Change in velocity/Time
a) Change in velocity = 3.5-0 = 3.5 m/s
Time = 0.4 seconds
Acceleration = [tex]3.5/0.4=8.75m/s^2[/tex]
b) Change in velocity = 0 - 3.5 = -3.5 m/s
Time = 5.6 seconds
Acceleration = [tex]-3.5/5.6=-0.625m/s^2[/tex]
Slow down acceleration = 0.625[tex]m/s^2[/tex]
c) 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 v = 0 m/s, u = 3.5 m/s, a = -0.625[tex]m/s^2[/tex]
Substituting
[tex]0^2=3.5^2-2*0.625*s\\ \\ s=9.8m[/tex]
So, car travels 9.8 m
A child and her mother are at the park. The child walks around the rectangular park while her mom waits on a bench. The child returns to the bench, finishing her walk at the same place she started. The park is 411 meters wide and 475 meters long. What distance did the child walk? 195,000 m 886 m 1,772 m 0 m
the correct answer is 0
The child walked a total distance of 1772 meters, which is the perimeter of the rectangular park measured by adding together twice the length and twice the width of the park.
To find out the distance the child walked around the rectangular park, we calculate the perimeter of the rectangle. The park is mentioned to be 411 meters wide and 475 meters long. To compute the perimeter, we add the length of all four sides of the rectangle together:
Perimeter of rectangle = 2( length) + 2(width)
Perimeter of the park = 2(475 m) + 2(411 m)
Perimeter of the park = 950 m + 822 m
Perimeter of the park = 1772 m
Therefore, the child walked a total distance equal to the perimeter of the park which is 1772 meters.
A glass is semifilled with liquid water and place in a room at 20 oc. after some time, part of the water evaporates. what happened to the average kinetic energy and the average potential energy of the water particles that escaped to the gas phase?
Water is placed at room temperature at 20 degree C
now after some water evaporate at room temperature
so here we can say speed of water molecules will not change as the temperature is same after evaporation
as we know that total kinetic energy is given by
[tex]KE = \frac{f}{2} nRT[/tex]
since temperature is same then energy will not change here
now as water evaporate to vapors then we can say that here all molecules are separated more in vapor phase so force of interaction will be less in this phase
And since potential energy depends on the force so potential energy will decrease in this phase
When water evaporates, the molecules that escape to the gas phase have an increase in average kinetic energy and a decrease in average potential energy.
Explanation:When a liquid, such as water, evaporates, the molecules that escape into the gas phase have an increase in average kinetic energy and a decrease in average potential energy compared to when they were in the liquid phase.
The increase in average kinetic energy is due to the fact that molecules in the gas phase move faster than those in the liquid phase. This increase in kinetic energy allows the molecules to overcome the intermolecular forces and escape into the gas phase.
On the other hand, the decrease in average potential energy occurs because the intermolecular forces holding the liquid together are weaker than those between molecules in the gas phase. As a result, the average potential energy of the molecules that escape to the gas phase is lower.
You are climbing a mountain that starts at sea level and reaches an elevation of 5000m. The distance traveled up the side of the mountain is 2km. What is the gradient of the mountain
Answer:
The gradient of the mountain is 2.5 m.
Explanation:
Given that,
Height = 5000 m
Distance = 2 km
Gradient of the mountain is the ratio of rise of y axis and rise of x axis.
We need to calculate the gradient of the mountain
Using formula of gradient mountain
[tex]gradient\ mountain=\dfrac{rise\ y}{rise\ x}[/tex]
Put the value into the formula
[tex]gradient\ mountain=\dfrac{5000}{2000}[/tex]
[tex]gradient\ mountain=2.5\ m[/tex]
Hence, The gradient of the mountain is 2.5 m.
a toy friction car is propelled forward from rest by a girl's hand which causes it to reach a forward velocity of 3.5m/s in 0.4 seconds. it is then rreleased and later stops in 5.6 seconds
Answer:
a) Acceleration = [tex]8.75m/s^2[/tex]
b) Slow down acceleration = 0.625[tex]m/s^2[/tex]
c) Car travels 9.8 m
Explanation:
Acceleration = Change in velocity/Time
a) Change in velocity = 3.5-0 = 3.5 m/s
Time = 0.4 seconds
Acceleration = [tex]3.5/0.4=8.75m/s^2[/tex]
b) Change in velocity = 0 - 3.5 = -3.5 m/s
Time = 5.6 seconds
Acceleration = [tex]-3.5/5.6=-0.625m/s^2[/tex]
Slow down acceleration = 0.625[tex]m/s^2[/tex]
c) 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 v = 0 m/s, u = 3.5 m/s, a = -0.625[tex]m/s^2[/tex]
Substituting
[tex]0^2=3.5^2-2*0.625*s\\ \\ s=9.8m[/tex]
So, car travels 9.8 m
The charge on a proton is
a.
negative, and the charge on an electron is positive.
b.
positive, and the charge on an electron is negative.
c.
the same as the charge on an electron.
d.
can change according to the situation.
Please select the best answer from the choices provided
A
B
C
D
Hello!
Second options is correct answer.
Explanation: The charge on a proton is a "positive, and the charge on an electron is negative". Hope this helps! Thank you for posting your question at here on Brainly. -Charlie
According to the electromagnetic spectrum, which wavelength is associated with the lowest energy level?
a.) visible
b.) ultraviolet
c.) gamma
d.) radio
Electromagnetic spectrum is the collection of electromagnetic waves arranged from low frequency electromagnetic waves to high frequency electromagnetic waves.
Electromagnetic waves are produced by electric charge that are accelerating. When a magnetic field combines with electric field electromagnetic waves are produced. The electric field and magnetic wave are perpendicular to one another in electromagnetic waves.
Below are the type of electromagnetic waves in electromagnetic spectrum: (from high frequency ---> low frequency)
Gamma rays - it is in the end of the electromagnetic spectrum, with highest frequency but shortest wavelength. Gamma rays are generated by radioactive substances.
X-rays - it is next to Gamma rays with respect to frequency but has longer wavelength. This wavelength can penetrate metal. It was discovered by Wilhelm Conrad Roentgen in 1895.
Ultraviolet - ultraviolet waves or ultraviolet radiation have shorter wavelength compared to visible light. The main source of UV radiation is the sun.
Visible Light- among other electromagnetic waves, this the only electromagnetic wave that is visible to the naked eye. The waves inside the range of visible light are the colors. From red( longest wavelength inside visible light) to violet (shortest wavelength inside visible light).
Infrared - infrared radiation is beyond the red color on the visible length. Bodies on earth radiated infrared radiation.
Hope this helps, good luck.
Answer:
Radio waves.
Explanation:
Electromagnetic spectrum is an example of an electromagnetic waves which does not require material medium for its propagation. This electromagnetic spectrums are listed according to increase in their energy level i.e from Gamma ray to Radio waves
According to the their energy level, Gamma ray>X-ray>Ultraviolet rays>Visible light>Infrared rays>Radio waves.
This arrangement is also in terms of their increasing frequency and decreasing wavelength. This shows that radiowaves has the lowest energy level out of the electromagnetic spectrum
Nitrogen is used to protect steel from water because nitrogen has ________.
A.high reactivity
B.low conductivity
C.high conductivity
D.low reactivity
Answer:
Nitrogen is used to protect steel from water because nitrogen has low reactivity.
Explanation:
Nitrogen is very low reactive element because it forms a gas when triple bond between two Nitrogen atoms. Due to low reactivity of Nitrogen the water does not react with the nitrogen and steel as well. So, for protection of steel Nitrogen is used.
While running around the track at school, Milt notices that he runs due East in the 100m homestretch and due West on the 100m backstretch. To train for the 800 m event, he runs both the 100 m homestretch and the 100m backstretch in 12.2 seconds. How do Mills velocities on the homestretch and backstretch compare
They have equal magnitudes and opposite directions.
Answer:
The magnitude of both velocities will be same but direction will be opposite.
Explanation:
Distance on Homestretch = d1 = 100 m
Distance on backstretch = d2 = 100 m
Time = t = 12.2 s
Magnitude of velocity on Homestretch = V1 = d1/t = 100/12.2 = 8.196 m/s
Magnitude of velocity on backstretch = V2 = d2/t = 100/12.2 = 8.196 m/s
if we look at the racecourse, we will come to know that runner runs on homestretch and backstretch in opposite direction. Hence, magnitude of velocities will be same but direction will be opposite.
Convenience sampling can be produce biased research results. True or false?
True is your answer.
Hope this helps....
The color of a substance is a physical property. Please select the best answer from the choices provided T F
Answer:
True
Explanation:
Color is the splitting of light into different spectra. Light, by nature, is monochromatic. This means that it has one wave length. The prism experiment has proved that light has many colors. About 7 colors have been discovered.
The colors simply denote the different wavelengths of the "monochromatic" light. The colors are the different wavelengths of light when it is split.
The eye, sees color as a reflection. In the electron sense, color is as a result o electrons being "excited" or promoted from a lower orbital to a higher energy orbital.
Which of the following quantities can be determined from a speed-time graph of a particle travelling in a straight line?
a. only the magnitude of the acceleration at a given instant
b. both the velocity and acceleration at a given point
c. only distance travelled in a given timed.
d. both distance in a given time and magnitude of the acceleration at a given instant
The answer is:
Both the distance traveled in a given time and the magnitude of the acceleration at a given instant
Hope I Helped!
Both distances in a given time and magnitude of the acceleration at a given instant can be determined from a speed-time graph of a particle traveling in a straight line, therefore the correct option is option D.
What are the three equations of motion?There are three equations of motion given by Newton
The first equation is given as follows
v = u + at
the second equation is given as follows
S = ut + 1/2×a×t²
the third equation is given as follows
v² - u² = 2×a×s
The area under the speed-time graph represents the distance covered by the object while the slope of the speed-time graph gives the acceleration of the object.
Thus, both distances in a given time and the magnitude of the acceleration at a given instant can be determined from a speed-time graph of a particle traveling in a straight line, therefore the correct option is option D.
Learn more about equations of motion from here
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