Hi all, A space probe on the surface of Mars sends a radio signal backto the Ear

Question

Hi all, A space probe on the surface of Mars sends a radio signal backto the Earth, a distance of 8.48 x 10 7power km. Radio waves travelat the speed of light ( 3.00 x 10 8power m/s). How many secondsdoes it take for the signal to reach the earth? ________s A group of college students eager to get to Florida on aspring break drove the 644 mi trip with only minimum stops. Theycomputed their average speed for the trip to be 55.5 mi/h. How manyhours did the trip take? ________h Hi all, A space probe on the surface of Mars sends a radio signal backto the Earth, a distance of 8.48 x 10 7power km. Radio waves travelat the speed of light ( 3.00 x 10 8power m/s). How many secondsdoes it take for the signal to reach the earth? ________s A group of college students eager to get to Florida on aspring break drove the 644 mi trip with only minimum stops. Theycomputed their average speed for the trip to be 55.5 mi/h. How manyhours did the trip take? ________h

Explanation / Answer

Both of these are r*t =d problems. Part A: d = 8.48e7km = 8.48e10m r = 3.0e8m/s r*t = d t = d/r t = 8.48e10m/3.0e8m/s = 282.67s = 4.71minutes =.0785hours Part B: d = 644mi r = 55.5 mph r*t = d   t = d/r t = 644mi/55.5m/hr = 11.6 hours

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