Select the correct answer. A basketball is rolling with a velocity of 0.5 meters/second relative to the ground and due north. A tennis ball is rolling with a velocity of 0.25
meters/second relative to ground in the same direction of the basketball. Find the velocity of the basketball relative to tennis ball.

The big glowy thing is called the sun it is a star in our galaxy and is over 1 million degrees

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.