Do Earth's continents gain or lose water, considering evaporation and precipitation together? How much? Please be precise.

What properties of a moving object are used in determining the object's energy of motion

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.

If the specific heat of a metal is 0.850 j/g °c, what is its atomic weight?