Sound travels at about 344 m/s, Light travels at about 300,000,000 m/s. If light

Question

Sound travels at about 344 m/s, Light travels at about 300,000,000 m/s. If lightning strikes 1600 meters (about one mile) away from you how long after the strike will you see the light? How long after the strike will you hear the thunder? The voyager spaceship is traveling away from earth at about 17,000 m/s. If it was launched exactly 29 years ago, how far away from earth is voyager today? (Assume constant velocity.) Rank the time required from highest to lowest. Crossing the USA (2680 miles) in a 747 airliner (920 km/hr) Driving from here to New York (868 miles) by car (100 km/hr) Running a marathon (26.2 miles) at world record speed (21 km/hr). Traveling from the Earth to the Moon (238, 900 miles) at the speed of the Voyager 1 spaceship (61, 200 km/hr). A different airplane also accelerates from rest to its takeoff speed of 32.5 m/s. It accelerates at a constant 2.5 m/s^2. How much runway does it use and how long did it take to get up to takeoff speed? A man runs 10.2 meters while slowing down at a constant rate of 1.2 m/s^2. If the trip took 2.2 seconds, what were his initial and final velocities? A train slows from an unknown initial speed to a final speed of 12.7 m/s over a distance of 1200 meters. If the train's acceleration was kept to a very low 0.155 m/s^2, how fast was it going initially, and how long did it take to travel the 1200 meters? A car starts at 32 m/s and, slowing down with constant acceleration, reaches a final speed of 23 m/s after a distance of 221 meters. What was the car's acceleration and how long did the trip take?

Explanation / Answer

time taken to see light is t = distance / speed of light = 1600/(3*10^8) = 5.34*10^-6 sec

time taken to hear thunder is t = distance /speed of sound = 1600/344 = 4.65 sec

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