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:
A: The angular velocity of the Earth around its axis is 0.000417 degrees per second. The angular velocity of the Earth around the sun is 0.986 degrees per day. The Earth can be thought of as simultaneously rotating, or turning, on its axis throughout the cycle of a 24-hour day and rotating around the sun once each year, creating the seasons.