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A closed piston-cylinder with air expands and does 2000 ft-lbs of work. Heat is added in the amount of 4 btu. What is the change in internal Energy.
consider a hypothetical element whose structure can be based on either of the followinga cell a base-centered
a student sits on a freely rotating stool holding two weights each of mass 3.09 kg. when his arms are extended
a particle of mass 0.350 kg is attached to the 100 cm mark of a meter stick of mass 0.150 kg. the meter stick rotates
a model 110 of scale of a tractor-trailer rig is tested in a wind tunnel. the cross section area of the model is 0.1 m2
100kpa and 22 degc air is contained in a rigid tank of 2 m3. there is supply line connected to the tank through a
a square plate of edge length 12.0 cm and negligible thickness has a total charge of 5.80 x 10-6 c. estimate the
five kilograms of air at 300 k is contained in a vertical cylinder by a frictionless piston of a mass such that the
a mixing chamber steadily mixes a hot water stream at 80degc and 0.5kgs rate with a cold water stream at 20degc. if the
a nozzle with inlet area of 800 cm2 and inlet steam velocity is 10ms. the steam pressure is 800kpa and temperature is
using the classical and relativistic expressions for kinetic energy calculate the range of velocities for a particle of
an old fashioned glass apothecary jar contains a patent medicine. the neck is closed with a rubber stopper that is 20
calculate the energy of vacancy formation in silver given that the equilibrium number of vacancies at 800 degc 1073k is
a 230-v shunt motor develops a torque of 40 ib-ft when the armature current is 11 a. find the torque developed when the
a jet is coming out of a dive and a sensor in the pilots seat measures a force 800lbs for a pilot whose weight is
the thermal efficiency of an internally reversible heat engine is 62 percent. the working fluid at 23c rejects 100
Steam at 10bar and 0.95 dry flows at 130 m/sec in a pipe. It is throttled to 8 bar and the flow rate is 12 kg/sec. Assuming velocity in the pipe on the down stream side of the valve is 160 m/sec. Find the final condition of steam and the pipe diam..
a carnot heat engine receives heat from a reservoir at 900c at a rate of 800 kjmin and rejects the waste heat to the
a ceramic bidet failed catastrophically in normal use causing serious lacerations to the person concerned. the facture
Assume they test null hypothesis H0: versus H1: Will the engineers decide to use the steel if H0 is rejected? Will the engineers decide to use the steel if H0 is not rejected?
two kg of saturated liquid water at 1 bar is compressed to 25 bar and 100degc in a water pump. determine the change in
a piston-cylinder device initially contains 0.07m3 of nitrogen gas at 130kpa and 120 degrees celsius. the nitrogen is
propane gas enters a continuous adiabatic heat exchanger at 40degc and 250 kpa and exits at 240degc superheated steam
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