The moment of intertia of Earth was recently measured to be 0.331MR2. What does this tell you about the distribution of mass inside the earth? (Hint: Which object has a moment of inertia of MR2?)

Rohit is trying to tune an instrument

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.

How much energy must a refrigerator absorb from 225 g of water so that the temperature of the water will drop from 35°c to 5°c