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q c is impact pressure (dynamic pressure) and; p is static pressure; is the ratio of specific heat of a gas at a constant pressure to heat at a constant volume (1.4 for air) The formula to compute Mach number in a supersonic compressible flow is derived from the Rayleigh supersonic pitot equation:
At 19:22, hydrophone and radar operators aboard the German warships detected the cruiser HMS Suffolk at a range of approximately 12,500 m (41,000 ft). [25] Prinz Eugen ' s radio-intercept team decrypted the radio signals being sent by Suffolk and learned that their location had indeed been reported.
Deep sea mining sites hold polymetallic nodules or surround active or extinct hydrothermal vents at about 3,000–6,500 meters (10,000–21,000 ft) depth. [35] [34] The vents create sulfide deposits, which collect metals such as silver, gold, copper, manganese, cobalt, and zinc. [14] [36] The deposits are mined using hydraulic pumps or bucket ...