Chlorpheniramine is an antihistamine that reduces the effects of natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose. Chlorpheniramine is used to treat runny nose, sneezing, itching, and watery eyes caused by allergies, the common cold, or the flu.
The mean orbital velocity of Earth is about 29.783 kilometers per second. That's the speed the planet is moving through space in its orbit about the sun. Earth's speed varies a bit because its orbit is slightly eccentric, but that's why we say mean orbital velocity. One can calculate this value by knowing two facts:
From any circular orbit you need to speed up by a factor of the square root of 2 to get to escape velocity. For Low Earth orbit, orbital speed is 17,500 MPH, and escape velocity is the square root of two (about 1.414) times as fast, or a little less than 25,000 MPH. good example of the difference between orbital speed and escape velocity is when Apollo went to the moon. First the Saturn V rocket boosted the astronauts into near Earth orbit which required a speed of about 18,000 mph.