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:
This is because the Earth is closest to the Sun during the Northern Hemisphere winter and according to Kepler's â¦ Law of Areas (and the conservation of angular momentum), planets move the fastest at perihelion and slowest at aphelion. 4 people found this useful.arth's speed varies â¦ 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: 1. The earth is approximately 150 million km from the sun (mean distance) and travels approximately in a circular orbit 2.