thank you guys who helped me when i got kidnapped- i can't thank enough but i hope there is enough points. :)

All phase changes are .an example of a phase change is an ice cube melting

A40 kilogram skier starts at the top of a 12 meter heigh slope. at the bottom she is traveling 10 meters per second how much does she lose to friction? a. 4,704 joules b. 2,704 joules. c.2,000 joules d. she doesn’t lose any because mechanical energy is conserved. 35

When connected to a 120 v outlet, a light bulb consumed a power of 50.4 watts. what is the current flowing through it?