Which of the following is a true statement?
a. electric fields increase in strength as you move farther from the charge, but electric forces decrease.
b. both electric fields and forces decrease in strength as the distance increases.
c. electric fields don't change in strength with distance from a charge, but electric forces do.
d. electric forces stay the same as distance changes, but electric fields change.

Which device uses ac current to operate?

Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart