Which of the following statements about geothermal energy is not true?
a. it is not a practical source of energy.
b. it is an important source of energy in volcanically active areas.
c. it works best when the magma pool is near the surface of earth.
d. it is a renewable source of energy.

After a big snowfall, you take your favorite rocket-powered sled out to a wide field. the field is 195 m across, and you know that your sled accelerates at a rate of 3.65 m/s2 when the rocket is on. how much time will it take the sled to cross the field starting from rest, assuming the rocket is on the whole time?

An object has a weight of 500 on earth what is the mass of this object

What is an aquifer for science class