It means that the satellite's orbital period is equal to the Earth's rotation period ... roughly 23 hours 56 minutes 4 seconds ... so that the satellite always stays over the same longitude.
IF that satellite's orbit has also been carefully placed over the equator, THEN the satellite is in a 'geostationary' orbit. It appears motionless in the sky, and can be used to sell 900 channels of TV to people with little dishes that they never need to move.
The answer is Paleoanthropology.
Napoleon failed to conquer Russia in 1812 for several reasons: faulty logistics, poor discipline, disease, and not the least, the weather.<span>Soldiers weakened by poor diets and fatigue are susceptible to disease.</span>
So we know that 1 km=100,000 centimeters, because 100 cetimeters =1 meter and 1,000 meters=1 km. Multiplying the two gets 100,000. Now there are 7.5 cm, so divide by 100,000 to get distance in km. .000075 is your final answer.
