What is the energy of an electromagnetic wave that has a frequency of 8.0 x 1015 Hz? Use the equation E = hf, where h = 6.626 x 10-34 J. s.
A. 5.3 x 1018 J
B. 5.3 x 10-18 j
C. 1.2 x 10-49 J
D. 1.2 x 1049

sonar - device which is used to find the submit submarines, sankalp ship. sonar waves consists of a transmitter and detector which are installed in the observation centre on board of a ship. the ultrasonic waves are sent into the sea at high frequency about 1000 khz in all direction.

are there options? cause you ain’t. real specific

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.

i really dont know but i will try okay.

so i think u would just add all them up and get your answer..