A 15 kg object performs simple harmonic motion of amplitude 40 cm. The restoring force is 60 N when the displacement is 40 cm. Find the potential energy when the displacement is 10 cm.

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?

Which two particles are found in the center of an atom

Lightning is an example of what phenomenon? a release of a large amount of energyan absorption of a large amount of energya natural electric circuita natural electric current