The moon is about 3.8 ✕ 108 m from earth. traveling at the speed of light, 3.0 ✕ 108 m/s, how long does it take a laser beam to go from earth to the moon and back again (in s)? the same physics was responsible for the noticeable delay in communications signals between lunar astronauts and controllers at the houston space flight center

Calculate the amount of heat produced when 18000 coulombs of charge is transferred in one hour through a potential difference of 50v

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?

To place a communications satellite into a geosynchronous orbit at an altitude of 22,240 mi above the surface of the earth, the satellite first is released from a space shuttle , which is in a circular orbit at an altitude of 185 mi, and then is propelled by an upper-stage booster to its final altitude. as the satellite passes through a, the booster's motor is fired to insert the satellite into an elliptic transfer orbit. the booster is again fired at b to insert the satellite into a geosynchronous orbit. knowing that the second firing increases the speed of the satellite by 4810ft/s, determine (a.) the speed of the satellite as it approaches b on the elliptic transfer orbit, (b.) the increase in speed resulting from the first firing at a.