a 2kg ball is traveling at 15 m/s at position 1. calculate the gravitational positional energy, kinetic energy and total mechanical energy for the Earth object system and the velocity of the object at the indicated positions below. assume no energy losses due to friction.

Sorry i don’t know what to do

Answervery cold;

Sounds propagates through some kind of medium. usually it's air, but it goes just as well through solid objects like walls, windows etc. a soundwave will compress the (air)molecules in front of it, and if this increased density wave hits your ears, you register it as sound. solid objects like walls are a lot denser than air, this means that they will damp a wave, but also carry it easier.