Answer:
Explanation: is that suppose to be the question or are you just saying?
Answer:
0.0025 sec
Explanation:
Period = 1 / frequency = 1/400 = 0.0025 sec
Answer: Electrostatics is a branch of physics that studies electric charges at rest.
Answer:
Transmission of telephone signals
Explanation:
Fiber optics are used for the transmission of telephone signals.
4 m/s because it is THR fastest voice