Answer:
increasing the temperature will also increase the number of collisions between molecules per unit time. Which means molecules at higher temperatures have more energy, thus they can vibrate faster. Since the molecules vibrate faster, sound waves can travel more quickly.
Slow down, but generally not move from there place. Which means molecules at a lower temperature have less energy, meaning sound waves can't travel through in a solid.
Explanation:
Sound waves can only travel in space if there are enough particles around to transmit the energy in the wave from the source thus meaning more kinetic energy more sound waves being able to quickly get through
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