The intensity of a spherical wave is defined as the power of the wave summed over an entire imaginary surface divided by the area of that imaginary surface. What relationship does this mean exists between intensity and wave amplitude

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form

As a pendulum bob swings back and forth several times, the maximum height it reaches becomes less and less. this is because more and more of the pendulum bob's energy is being transformed into a. heat energy b. kinetic energy c. potential energy d. kinetic energy and potential energy

Which of these is not a possible type of energy transformation? a. electrical energy into light energy b. sound energy into nuclear energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy