Question

clap your hands together then rub them. friction, right? what energy do you hear and feel? (these are the big wasters of energy in every machine!) thermal energy sound energy both sound and thermal energy rewatch

Explanation:

When clapping and rubbing hands, friction occurs. Rubbing hands produces heat (thermal energy, felt as warmth) and sound (sound energy, heard as clapping/rubbing noise). So both energies are present.

Answer:

Both Sound and Thermal Energy (the option "Both Sound and Thermal Energy")