Question

select all the correct answers. a worker is holding a filled gas cylinder still. which two sentences are true about the energy of the filled gas cylinder? it has no energy because its being held still. it has gravitational potential energy because of its height. its atoms and molecules have thermal energy. it has motion energy because it will fall if let go. its kinetic energy is being converted to potential energy.

Explanation:

Step1: Analyze energy concepts

An object at a non - zero height has gravitational potential energy given by $U = mgh$ (where $m$ is mass, $g$ is acceleration due to gravity and $h$ is height). The gas cylinder held at a height has gravitational potential energy.

Step2: Consider thermal energy

At any non - absolute zero temperature, atoms and molecules of a substance have thermal energy due to their random motion. The gas in the cylinder has atoms and molecules with thermal energy.

Step3: Evaluate other options

The cylinder is not in motion currently so it has no kinetic (motion) energy at the moment. And since it is not moving, there is no conversion of kinetic energy to potential energy. Also, it is not true that it has no energy just because it is held still.

Answer:

It has gravitational potential energy because of its height.
Its atoms and molecules have thermal energy.