An accessory such as a coupling that performs a mechanical rather than an electrical function is called?

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

As microwave light travels through a liquid, it moves at a speed of 2.2 x 108 m/s. if the frequency of this light wave is 1.1 x 108 hz, what is the wavelength of this microwave?

The diagram shows a wave. the quantity shown is the amplitude. this quantity is directly proportional to which of these other quantities? a) energy b) frequency c) period d) wavelength