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A rigid tank is divided into two equal parts by a partition. One part of the tank contains 3.1 kg of compressed liquid at 400 kPa and 60 degrees Celcius while the other part is evacuated. The partition is now removed, and the water expands to fill the entire tank. Determine the entropy change of water during this process if the final pressure in the tank is 20 kPa.
an electronic device such as a power transistor mounted on a finned heat sink can be modeled as a spatially isothermal
hydrogen at 25 bar 450degc enters an adiabatic turbine and expands to 2 bar 160degc with a mass flow rate of 0.2 kgs.
an aqueous ester hydrolysis reaction a -gt b c has k 0.02 min-1 and an equilibrium constant of 10 with all
Air is contained in a piston-cylinder assembly, initially at 40 lbf/in^2. And 600R the air expands in a poly tropic process with n=k=1.4 until the volume is doubled. Modeling the air as an ideal gas with constant specific heats,
a hydraulic shear applies 2000 lb force to a wedge. it is used to shear plate steel to rough size. the shear has a 14
the lifetime in hours y of an electronic component is a random variable with density function given bynbspfy1100 e-y100
a simple steam power system has a turbine inlet state of 120 bars and 600c and exhaust pressure of 0.08 bar. the
Hot coffee of temperature T[infinity] = 90°C is poured into a cup whose wall is initially at the temperature Ti= 10°C. The porcelain wall of the cup is 0.5 cm thick. The heat transfer coefficient between the coffee and the wetted surface is h= 700 W/..
the wall of a heat exchanger receives a variable heat flux as shown in the figure. the heat flux is q dot of second
you are manufacturing a frame for a vehicle out of some aluminum alloy 6061-t451 tubing. the frame is to be welded
040 kg automobile is accelerated from 5 kmph to 70 kmph. What is the average power (in hp) required if this is done in 7 s?
How much energy (kJ) is required to accelerate a 1500 kg passenger vehicle from rest to highway speed (110 km/hr)? If it takes fifteen seconds to accelerate the vehicle, what is the average power (kW)?
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