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.
It takes 2 days. You might think that that's a long time for a space shuttle to go to the space station. Especially when you know that it takes about 2 minutes for the space sâ¦huttle to go into space. But here's why: The space station is orbiting the earth, and so will the space shuttle when it goes into space.