Radio telescopes beam radio waves into space. to calculate the speed of the radio waves in space, which additional piece of information, if any, is necessary? the frequency of the radio waves. the strengths of the electric and magnetic fields. the wavelength of the radio waves. none (the speed is a known constant).

the moon affects the earth gravitation ally, causing certain motions of that body and also producing tides in its ocean and atmosphere. the tidal wave in our atmosphere is, however, far too minute to be an effective cause in any known meteorological phenomenon.

explanation:

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

answer(20) psi;