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.

What are similarities and differences between refraction, reflection, diffraction and absorption?

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

If a simple machine reduces the strength of a force, what must be increased?