A tennis ball is thrown out a window 28 m above the ground at an initial velocity of 15.0 m/s and 20.0 degrees below the horizontal. How far does the ball move horizontally before it hits the ground?

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

Name two kinds of practical electric pumps.