Question

True or false: Sound, light, the movement of molecules, and a rolling cart are all examples of kinetic energy.

Answer 1

The statement is true: Sound, light, the movement of molecules, and a rolling cart are all examples of kinetic energy, which is the energy objects possess due to their motion.

Step-by-step explanation:

The statement is true: Sound, light, the movement of molecules, and a rolling cart are all examples of kinetic energy. Kinetic energy is defined as the energy associated with objects in motion. For instance:

• Sound is produced by the kinetic energy of vibrating particles in a medium such as air, creating pressure waves that we can hear.
• Light, or electromagnetic radiation, has kinetic energy because photons, the basic units of light, are always in motion.
• The movement of molecules, particularly in gases and liquids, represents thermal energy, which is a form of kinetic energy due to the random motion of these molecules.
• A rolling cart possesses kinetic energy because it is moving, and its kinetic energy can be calculated using the formula KE = 1/2mv², where 'm' stands for mass and 'v' for velocity.