Static discharge differs from electric current because static discharge is described by which of the following?
a involves the movement of ions as well as electrons
b results because a force is exerted on electrons
c lasts for only a fraction of a second
is the flow of electrons

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?

What is the speed of an object at a given moment?

What is the increase in density of a medium due to wave travel?