Answer:
Part A:
Part B:
Explanation:
<u>Given:</u>
- = initial velocity of the electron =
- = electric field strength = 9100 N/C
<u>Assumptions:</u>
- = mass of the electron =
- = final velocity of the electron = 0 m/s
- = distance at which the electron comes to rest
- = magnitude of charge on an electron =
- = taken by the electron to return to its initial position
- = displacement of the electron
Part A:
Since the electron moves in the direction of the electric field, the electric force will act on it in the direction opposite to electric field. This electric force does work on it to make the electron come to rest.
Using the work-energy theorem, the work done by the electric field will be equal to the kinetic energy change of the electron.
Hence, the electron comes to rest by travelling a distance of .
Part B:
In this part, let us first find out the acceleration of the electron due to the electric force.
The electron moves with the above acceleration constantly as it moves in the uniform electric field.
Since the electron is supposed to move from a point and then again move back to the same point. This means the displacement of the electron is zero.
Since the electron starts moving at t = 0 s.
Hence, the electron returns to the starting position after .
Because a Celsius degree is 80% bigger than a Fahrenheit degree.
Answer: 2.17 s
Explanation:
The described situation is related to projectile motion (also known as parabolic motion). So, this kind of motion has a vertical component and a horizontal component; however, in this case we will only need the equation related to the horizontal displacement :
Where:
is the arrow's horizontal displacement
is the arrow's initial velocity
is the angle
is the time the arrow is in the air
Isolating :
Solving with the given data:
This is the time the arrow is in the air
Answer:
Average speed = 8.8 m/s
Average velocity = 8.8 m/s
Explanation:
From the question,
Avearge speed = 2πr/t................ Equation 1
Where r = 14 m, t = 10 s
Constant π = 22/7
Substitute this value into equation 1
Average speed = 2(22/7)(14)/10
Avearge speed = 8.8 m/s.
For a body moving in circular motion, The average speed and average velocity are equal.
Hence,
Average speed = 8.8 m/s
Average velocity = 8.8 m/s
Answer:
The amount of heat flow is . How does heat flow through solids? Conduction is the transfer of heat through solids. Factors that affect rate of heat flow include the conductivity of the material, temperature difference across the material, thickness of the material, and area of the material.
Explanation: