Ch1 Solutions S17 QUESTIONS WITH 100% CORRECT ANSWERS/ A+ GRADE

1. About how many minutes will it take a pulse of light to travel from the sun to the earth? The speed of light is 299,792,458 m/s, which is 299,792.458 km/s. So this is the distance in km that light travels in a second. To find how many of these distances make up the distance to the sun, which is 149,597,870.7 km, take 149,597,870.7 / 299,792.458 = 499 number of these distances. So it takes 499 times the distance that light can travel in one second to make the distance from earth to the sun, therefore it takes 499 seconds for light to reach the earth, which is 499/60 = 8.317 minutes. As one calculation: (149,597,870.7 / 299,792.458 ) / 60 = 8.317 minutes 2. The figure below (see textbook) is a video that starts with a graph of