How does mass affect the roller coasters speed?

An air bubble of volume 20 cm³ is at the bottom of a lake 40 m deep, where the temperature is 4.0°c. the bubble rises to the surface, which is at a temperature of 20°c.take the temperature of the bubble’s air to be the same as that of the surrounding water. just as the bubble reaches the surface, what is its volume?

Describe how the motion of a spring being pushed forward and backward is similar to the motion of air particles in a sound wave.

How can a cyclist's acceleration change even if its velocity remains constant?