Asound wave has a frequency of 619 hz in air and a wavelength of 0.51 m. what is the temperature of the air? assume the velocity of sound at 0◦c is 335 m/s.

Ahydroelectric plant takes energy from water and turns it into electrical energy. what are the transformations of energy in the water molecules that are used in the process of generating electricity this way?

Diamond will scratch quartz. true or false

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy.work depends on the square of the change in potential energy.work is equal to the negative of the change in kinetic energy.work is equal to the square of the change in kinetic energy