Physics Math Based:During an Apollo Moon landing, reflecting panels were placed on the moon.?
During an Apollo Moon landing, reflecting panels were placed on the moon. This allowed earth-based astronomers to shoot laser beams at the moons surface to determine its distance. The reflected laser beam was observed 2.52 seconds after the laser pulse was sent. If the spped on light is 3.00 x 10^8 m/s, what was the distance between the astronomers and the moon?
Im stumped on this question, i just dont know what formula to use or how to go about this. Another problem I face is with:
In many locations, old abandoned stone quarries have become filled with water once excavating has been completed. While standing on a 10.0 meter high quarry wall, Clarence tosses a piece of granite into the water below. If Clarence throws the rock horizontally with a velocity of 3.0m/s, how far out from the edge of the cliff will it hit the water?
Both these problems have stumped me, any help on ways to solve them would be greatly appreciated!
(3.00*10^8)*2.52=7.56*10^8 (distance to the moon and back, because speed*time=distance)
(7.56*10^8)/2=3.78*10^8 (distance one way)
but i don't think electrons don't move as fast as photons although i may be wrong
As for the second one:
sqrt[(2*10)/9.8]=1.429 (time the rock is airborne, because time=sqrt[(2*distance)/acceleration])
3*1.429=4.286 (distance away from the cliff, the rock hits the water, because velocity*time=distance)
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