A boy accidentally dropped a marble from his apartment window. If the mass of the marble is 10 g and the height from which it was dropped was 65 m, what was the speed of the marble when it hit the ground? Assume that the air resistance can be neglected and g = 10 m/s2

Which statement best describes who the period and frequency of electromagnetic was change between gamma rays and microwaves? a) the period and frequency stay the same. b) the period increases and the frequency decreases. c) the period decreases and the frequency increases. d) the period increases and the frequency increases.

What is the radius of the circular path ofa charged particle in a magnetic field?

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects