Calculate the weight of an airplane reduced
When you move up from the surface of the earth the gravitation is reduced as g = 9.807 - 3.32 × 10-6 z, with z as the elevation in meters. How many percent is the weight of an airplane reduced when it cruises at 11 000 m?
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A certain black box contains unknown resistances and sources of emfs connected in an unknown way such that (1) a 10 n resistor accrpss the terminals draws 1.0A and (2) and 18n resistor draws .60A. WHat resistance will draw 0.10A?
Air at 1 atm and 30 °C flows over a 15 cm square plate at a velocity of 10 m/s. Calculate the maximum boundary layer thickness.
Helium at atmospheric pressure and 30 °C flows across a square plate at a free stream velocity of 15 m/s. Calculate the boundary layer thickness at a position where Re = 250,000.
Fixed to the origin is a charge q = -0.320 nC. Is there a location, including the effects of gravi- ty, where a proton can be in equilibrium? Explain. If so, what is that location and is it a stable equilibrium position?
Two cylinders are filled with liquid water, ? = 1000 kg/m3, and connected by a line with a closed valve. A has 100 kg and B has 500 kg of water, their cross-sectional areas are AA = 0.1 m2 and AB = 0.25 m2 and the height h is 1 m. Find the pressur
The plate is heated over its total length to a temperature of 55 °C. The fluid velocity is measured 30 cm from the edge of the plate and found to be 22.5 m/s. Is the flow laminar or turbulent? Justify your answer.
The air above water is cooled as a result of the water absorbing heat from the air. The density of air is 1.29 kg/m3 and the specific heat of air is 1000 J/kg oC. How large a volume of air would be cooled by 1 degree Celsius if 1.57kg of water incre
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