The temperature of a sample of water is raised from 15 degree C to degree C when 8500 J of energy are added to the water. The specific heat of water is 4.18J / g * C . What is the mass of this sample of water?

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.