Ineed some pls : )
the amplitude of a wave is dependent upon what?
a. the amount of energy carried by the wave
b. the maximum displacement from the rest position
c. neither a nor b
d. both a and b

Aparticle moves according to a law of motion s = f(t), 0 ≤ t ≤ 12, where t is measured in seconds and s in feet. f(t) = cos(πt/6) (a) find the velocity at time t (in ft/s).

Which of the following represents a virtual image?

Ben(55 kg) is standing on very slippery ice when junior(25kg) bumps into him. junior was moving at a speed of 8m/s before the collision and ben and junior embrace after the collision. find the speed of ben and junior as they move across the ice after the collision .