In order to understand why some combinations of alkyl halides and nucleophiles give a substitution reaction, whereas other combinations give elimination, and still others give no observable reaction, we must investigate systematically the way in which changes in reaction variables perturb the course of the reaction.
It's true - the ISS moves at about 17,000 mph (~28,000 kph). Now for your other questions: 1. When it's not using its onboard engines to adjust its orbit, the station is in free-fall*. This means that gravitational interaction with the earth maintains the station's orbit, and thus its speed.
What is the average speed of the space shuttle. The space shuttle takes off from Cape Canaveral in Florida and orbits Earth 19 times before landing back at Cape Canaveral 24 hours and 15 minutes later. During this time, it moves in a circular orbit with radius 6.7 x 10 6 m?