If Galileo's experiment did not measure the speed of light, what did it measure? a) the speed of light using large distances
b)measured reaction time
c)the accurate measure of the speed of light in the air
d)calculated the speed of light over a short distance

What is the length x of the side of the triangle below? (hint: use the cosine function)

From center station, a train departs every 30 minutes on the fast line and a train departs every 50 minutes on the state line. if two trains depart from center station at 8: 00 a.m., one on each of the two lines, what is the next time that two trains, one on each line, will depart at the same time?

What is the temperature in degrees celsius of a substance with a tempature of 49k