At a particular time, The distance to Mars is 7.5×10^10 meters. How long (in seconds) does it take for a radio signal from Mars Pathfinder to be received by NASA on earth? Answer to two decimal places.

What do radio waves and microwaves have in common? both are at the side of the spectrum that has the shortest wavelengths. both are at the side of the spectrum that has the lowest radiant energy. both are at the side of the spectrum that has the lowest frequency. both are found next to visible light on the electromagnetic spectrum.

Aknife blade is a(n) a. lever b. screw c. wedge d. inclined plane

Assume similar data for the motion of the blood in your aorta. estimate how many beats of the heart it will take the blood to get from your heart to your brain. (assume that the distance from your heart to your brain is 30 cm)