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.
How fast is a space shuttle in the space? The orbiter's velocity on orbit is approximately 25,405 feet per second (17,322 statute miles per hour). In order to return to earth, the shuttle fires its Orbital Manuevering â¦ Engines (OMS) in the direction opposite to its orbit.he orbiter's velocity on orbit is approximately 25,405 feet per second (17,322 statute miles per hour). In order to return to earth, the shuttle fires its Orbital Manuevering â¦ Engines (OMS) in the direction opposite to its orbit.