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ram pressure
subjectfact 
ram pressurehas definition Motion of a blunt body at supersonic velocity through an ambient gaseous medium causes a strong drag or ram pressure to be exerted on the body. In the case of a galaxy moving through the intergalactic gas, the ram pressure is capable of stripping the galaxy of much of its interstellar gas.has source: Silk, J. 1990 The Big Bang, W. H. Publishers, New York, 2001-09-27 09:33:13.0
is a kind of pressure2001-09-27 09:33:13.0
pressurehas unit pressure unit2001-09-27 09:33:13.0
numberhas value2001-09-27 09:32:57.0