Answer.
1.Surge protection board
2.Uninterrupted Power Supply (UPS)
Explanation
A surge protection board is designed to protect equipment against a power surge or over voltage in power supply.A UPS provides back up power in occasions of power outage.In most events of power cut,UPS units only allow a person to save the work and perform a controlled shutting down of a computer.
You have to think about, what could happen to you if you shared this information.
Hope this helped!
~Izzy
Answer:
i dont under stand it ........
Answer: Cell phones use radio waves to communicate
Explanation:
Radio waves carry the information and travel in air at the speed of light. Cell phones transmit radio waves in all directions.