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A pison-cylinder contains 0.8 kg of steam of 300oC and 1 MPa. The steam is cooled at constant pressure until one-half of the mass condenses. (a) find the final temperature (b) determine the volume change.
a droplet of water diameter 100 um is falling through 20oc air at the terminal velocity of 0.298 ms. the relative
a 10-lb block b rests as shown on a 20-lb bracket a. the coefficients of friction are us0.3 and uk0.25 between block b
a carnot heat engine operates between a heat source at 1200 k and the environment at 300 k. the net work produced by
What gas pressure will the experimenter measure inside the bulb, A glass bulb contains air at room temperature and at a pressure of 1 atmosphere. It is placed in a chamber filled with helium gas at 1 atmosphere and at room temperature
Determine Fourier Number, Compare two identical steel spheres, except the first has a two inch diameter while the second sphere has a four inch diameter. The larger sphere will have a Fourier number approximately
Calculate the e?ciency of the furnace if the speci?c heat capacity of the water is cp = 4.2kJ/(kgK) and the zero level of enthalpy is at 0?C! (η = 79.6%)
an electrical power transformer of diameter 250 mm and height 600 mm dissipates 1200 w. it is desired to maintain its
a servomotor is connected to a forearm axis drive shaft without any reduction drive components. the maximum weight of
A steel alloy to be used for a spring application must have a modulus of resilience of at least 2.07 MPa (300 psi). What must be its minimum yield strength?
a pump steadily delivers 15.2 kgs of water at the conditions given below. calculate the pump power kw. there is no heat
if coal that has 2.25 sulfur and a heat content of 13000 btulb is burned in a 40 efficient 400-mw plant estimate the
A mixture of dry air and water vapor is at a temperature of 21C under a pressure of 101.3 kPa.The dew point temperature is 15C.(Ps= saturation pressure at 15C=1.7044 kPa;Pd=saturation pressure at 21C=2.4861 kPa) find humidity ratio and relative hu..
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