Answer:
positive plate
E = 5.764 KV / m
W = 490eV or 7.85 * 10^-17 J
E_p = 4.74 *10^(-12) eV
E_k = 490 eV
Explanation:
part a
The potential difference between two plates = 490 V
Distance between two plates = 8.5 cm
Answer: The positive plate is at higher potential because of convention.
part b
Electric Field between the plates
E = V / d
E = 490 / 0.085 = 5.764 KV / m
Answer: Electric Field between the plates E = 5.764 KV / m
part c
Work done by electric field
W = V*q
W = 490 * 1.602*10^-19
W = 7.85 * 10^-17 J
or W = 490 eV
Answer: Work done by electric field W = 490eV or 7.85 * 10^-17 J
part d
Potential Energy of an electron gained:
E_p = m_e * g * d / (1.602*10^-19)
E_p = 9.109*10^-31* 9.81 * 0.085 / (1.602*10^-19)
E_p = 4.74 *10^(-12) eV
Very very small E_p approximately 0
Answer: Potential Energy of an electron gained E_p = 4.74 *10^(-12) eV or 0.
part e
Kinetic Energy of an electron gained:
W - E_p = E_k
E_k = 490eV - 4.74*10^(-12)eV
E_k = 490 eV
Answer: Kinetic Energy of an electron gained E_k = 490 eV
Answer: Both cannonballs will hit the ground at the same time.
Explanation:
Suppose that a given object is on the air. The only force acting on the object (if we ignore air friction and such) will be the gravitational force.
then the acceleration equation is only on the vertical axis, and can be written as:
a(t) = -(9.8 m/s^2)
Now, to get the vertical velocity equation, we need to integrate over time.
v(t) = -(9.8 m/s^2)*t + v0
Where v0 is the initial velocity of the object in the vertical axis.
if the object is dropped (or it only has initial velocity on the horizontal axis) then v0 = 0m/s
and:
v(t) = -(9.8 m/s^2)*t
Now, if two objects are initially at the same height (both cannonballs start 1 m above the ground)
And both objects have the same vertical velocity, we can conclude that both objects will hit the ground at the same time.
You can notice that the fact that one ball is fired horizontally and the other is only dropped does not affect this, because we only analyze the vertical problem, not the horizontal one. (This is something useful to remember, we can separate the vertical and horizontal movement in these type of problems)
Answer:
30.5
Explanation:
because you will basically have to be like flash
The role of friction is of great importance when creating safety ramps and escalators because with the help of friction things move.
<h3>Why is it important to move objects slowly on ramps and escalator?</h3>
It is important to move objects slowly on ramps and escalator because the ramps and escalator moves object in the opposite direction of gravity. If we did not move objects slowly, then the objects or a person get damaged.
So we can conclude that the role of friction is of great importance when creating safety ramps and escalators because with the help of friction things move.
Learn more about friction here: brainly.com/question/24338873#SPJ1
The answer is true hope that helped!!
