Author Question: If the electric field is halved in a region of space, what happens to the electric field energy in a ... (Read 70 times)

geodog55 · **on:** Jul 28, 2018

If the electric field is halved in a region of space, what happens to the electric field energy in a 10 cm3 volume of this space.
a. It quadruples.
c. It halves.
b. It becomes one fourth as much.
d. It doubles.

Question 2

A 0.20-m radius grinding wheel starts at rest and develops an angular speed of 12.0 rad/s in 4.0 s. What is the average tangential acceleration of a point on the wheel's edge?
a. 0.45 m/s2
c. 28 m/s2
b. 0.60 m/s2
d. 14 m/s2