The answer is C. You must divide your wavelength and your frequency to get your answer.
Cellphones use radio frequency waves to transmit sound through the speaker and the microphone.<span> The radio frequency energy that is given off by cell phones is a type of electromagnetic energy.
I hope I helped! =D</span>
Yes... This is a question google could answer. Just Saying
Same magnitude (1000N) and opposite direction
you may also answer -1000 N
The answer is most likely D. hope that helped