Solar energy powers five types of renewable-energy sources. Give the pros and cons of these alternative energy sources.

How can you tell the difference between rough er from smooth er?

1. you serve a volleyball with a mass of 2.1 kg. the ball leaves your hand with a speed of 30 m/s. the ball has energy. calculate it. 2. a baby carriage is sitting at the top of a hill that is 21 m high. the carriage with the baby weighs 12 n. the carriage has energy. calculate it. 3. a car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. the car has . calculate it.

Add solid urea to a beaker of water. the beaker gets very cold. is δh favorable or