Two radio waves are used in the operation of a cellular telephone. to receive a call, the phone detects the wave emitted at one frequency by the transmitting station or base unit. to send your message to the base unit, your phone emits its own wave at a different frequency. the difference between these two frequencies is fixed for all channels of cell phone operation. suppose the wavelength of the wave emitted by the base unit is 0.34394 m and the wavelength of the wave emitted by the phone is 0.36140 m. using a value of 2.9979 108 m/s for the speed of light, determine the difference between the two frequencies used in the operation of a cell phone.

Explanation:

The frequency of an electromagnetic wave is given by:

where

is the speed of light

is the wavelength of the wave

For the first wave,

so the corresponding frequency is

For the second wave,

so the corresponding frequency is

So the difference between the two frequencies is

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

the answer is kevlar