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

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

Table sugar completely dissolved in water is an example of a?

Scientists have developed an explanation of a phenomenon from several verified hypotheses. the explanation has been confirmed through numerous experimental tests.which option best describes this explanation? a. scientific lawb. research questionc. hypothesisd. scientific theory