At what height would a volleyball reach if throw straight up at a initial velocity of 20 m/s

Gam radio signals can usually be heard behind a hill, but fm often cannot. that is, am signals bend more than fm. explain. (radio signals, as we shall see, are carried by electromagnetic waves whose wavelength for am is typically 200 to 600 m and for fm about 3 m.)

What is special about a dc circuit ?

What’s #16 asking and how do i solve it?