A radar signal is sent into space and travels at a speed of 300,000 km/s. It takes 20 seconds for the signal to return to Earth. What is the velocity of the radar signal?

Group of answer choices

20 s

300,000 km/s

300

1

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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