Steam at 100°C enters a radiator and leaves as water at 80°C. The mass of the steam is 3.5 kg. Take the heat of vaporization to be 2.3x10 J/kg. How
much energy was released? Remember that Cwater = 4180 J/kg . K.

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.

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?

What conclusion can be made based on the temperature of soil when the light hits the soil at 0°, 45°, and 90° angles in section 2 of the experiment? did your results support your hypothesis? why or why not?