Identify all the forms of energy you see
in the picture below.

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?

Describe how the motion of a spring being pushed forward and backward is similar to the motion of air particles in a sound wave.