A5.08 g object moving to the right at 28.5 cm/s makes an elastic head-on collision with a 10.16 g object that is initially at rest. 28.5 cm/s 5.08 g 10.16 g find the velocity of the first object immediately after the collision. the acceleration of gravity is 9.8 m/s 2 . answer in units of cm/s.

Because they're in different places for this the temperature varies.

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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.