Answer:
Options A, D and E....make up cell theory
Answer:
Solar surface absorbs the radio waves, it does not reflect the radio waves to earth. So the radar can not be used to measure the distance from earth to the sun. However we can use the Kepler' s third law to measure the planet earth's distance from the sun.
Explanation:
Time = distance/speed. Speed = distance/time = 50/5 = 10m/s.