Search results
Results from the WOW.Com Content Network
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:
Increasing the barometric pressure raises the dew point. [10] This means that, if the pressure increases, the mass of water vapor per volume unit of air must be reduced in order to maintain the same dew point. For example, consider New York City (33 ft or 10 m elevation) and Denver (5,280 ft or 1,610 m elevation [11]). Because Denver is at a ...
Many TNOs are often just assumed to have Pluto's density of 2.0 g/cm 3, but it is just as likely that they have a comet-like density of only 0.5 g/cm 3. [ 4 ] For example, if a TNO is incorrectly assumed to have a mass of 3.59 × 10 20 kg based on a radius of 350 km with a density of 2 g/cm 3 but is later discovered to have a radius of only 175 ...
In an earthquake, damage to buildings and infrastructure is related more closely to ground motion, of which PGA is a measure, rather than the magnitude of the earthquake itself. For moderate earthquakes, PGA is a reasonably good determinant of damage; in severe earthquakes, damage is more often correlated with peak ground velocity .
Coefficients of friction range from near zero to greater than one. ... 0.9–1.0 [35] [41] 0.005 ... on the front surface is thus larger than the force of pressure ...
The boundary between the two, the tropopause, lies at a pressure of 0.1 bars (10 kPa). [25] The stratosphere then gives way to the thermosphere at a pressure lower than 10 −5 to 10 −4 bars (1 to 10 Pa). [25] The thermosphere gradually transitions to the exosphere. [88]
For example, because humidity reduces ambient oxygen concentrations (dry air is typically 20.9% oxygen, but at 100% relative humidity the air is 20.4% oxygen), flue gas fans must intake air at a higher rate than would otherwise be required to maintain the same firing rate.
For every mass (kilogram, pound, or any unit of weight) of cement (c), about 0.35 mass of water (w) is needed to fully complete the hydration reactions. [ 1 ] However, a fresh concrete with a w/c ratio of 0.35 may not mix thoroughly, and may not flow well enough to be correctly placed and to fill all the voids in the forms, especially in the ...