The crest is the top part of a transverse wave
ex: /\/\/\ the crests are at the top points of the wave
hope this helps :)
Kinetic energy because the sledge hammer is moving so it has kinetic energy.
It’s E cause water when it freezes it expands and water flows down
Sunlight is radiant energy. The radiant energy is converted into chemical energy through the process of photosynthesis in the chlorophyll i think thats what u looking for