Once the car is on top of the hill it contains potential energy witch means it is storing enough energy to slide the hill until acted on. Once the car moves and slides down the hill it creates kinetic energy witch means it's in motion. The car then turns the kinetic energy into mechanical energy witch means it's working. I'm not sure if that helped but good luck!
Answer:
This is worded strangely.
When you are equally distant from the speakers, their tones interfere constructively. ... <span>By how much should a pair of light rays from a common source differ in distance traveled to produce destructive interference</span>
Answer:
The answer would: Acidic, pH= 6, stay the same
