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Generally, how does the effectiveness change if the size (surface area) of a heat exchanger is increased? If the overall heat transfer coefficient is increased? If the ratio of heat capacity rates is decreased? As manifested by the number of transfer units, are there limitations to the foregoing trends? What penalty is associated with increasing the size of a heat exchanger? With increasing the overall heat transfer coefficient?
what are the properties of petrol that it makes particularly suitable for the use as afuel in a motor vehicle.
a piston-cylinder device initially contains 1.4 kg of refrigent-134a at 140 kpa and 20 degc. heat is now transferred to
an egg can be approximated as a 5.5 cm diameter sphere with rho 1020 kgm3 cp 3.32 kjkgc. determine the heat transfer
Calculate the force of attraction between a K+ cation and a O2- anion, the centers of which are separated by a distance of 1.5 nm.
A Pitot-static probe connected to a water manometer is used to measure the velocity of air. If the deflection (the vertical distance between the fluid levels in the two arms) is 7.3 cm, determine the air velocity. Take the density of air to be 1.2..
a piston cylinder assembly contains a fixed amount of a gas at a given temperature and pressure. for a specified
air at 101 kpa and 21 degree c dry bulb and 60 percent relative humidity enters an industrial dryer and is discharged
a 20-mm diameter rod made of a ductile material with a yield strength of 350 mpa is subjected to torque of 100 n.m and
Calculate the angular separation between the first order minima on either side of the central maxima when the slit has a width of 6x10-4 cm & light illuminating it has a wavelength of 6000A0?
an hydraulic turbine operates under an available head of 85 m at a flow rate of 0.25 m3s. the electrical power output
Treat the locomotive as a particle and assume that the railroad tracks are rectilinear and horizontal.
The steam from the nozzles of a single wheel impulse turbine discharges with a velocity of 600 m/s at an angle of 20 degrees. The blade wheel rotates at 3000 rev/min and the mean blade radius is 590 mm
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