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A rigid tank with a volume of 0.117 m3 contains 1 kg of refrigerant-134a vapor at 240 kPa. The refrigerant is now allowed to cool. Determine the pressure when the refrigerant first starts condensing. Also, show the process on a P-v diagram with respect to saturation lines.
a flat isothermal heating panel 0.5 m wide by 0.8 m high is mounted to one wall of a large room. the surface of the
Consider a cable box with a tamper resistant private key inside it. Can you imagine a side-channel attack on the above implementation to find the private key? Hint: Can you do something with a multimeter?
A petroleum engineer estimates that the present production of 400,000 barrels of oil during this year from a group of 10 wells will decrease at the rate of 15% per year for years 2 through 10. Oil is estimated to be worth $25 per barrel. If the inter..
propane undergoes a process from state 1 where p11.4 mpa t160 c to state 2 where p21.0 mpa during which the change in
two slender rods of negligible weight are pin-connected at a and attached to the 18-lb block b and the 80-lb block c as
an inward radial flow turbine is to develop 400 hp when supplied with air at 800c and 3 bar abs the exhaust total
an inventor claims to have devised a refrigeration cycle that at steady state requires a net power of .8 hp to remove
a spacecraft is in a circular equatorial orbit 1 of radius r0 and speed v0 about an unknown planet mu not equal to
a piston with a mass of 500 kg is being held in place by 0.5 kg of oxygen in a circular cylinder of diameter of 50 cm.
a pump is located 4.5 m to one side of and 3.5 m above a reservoir. the pump is designed for a flow rate of 6 ls. for
If an elevator starting from rest accelerates at 10 m/s^2 and then decelerates at -1 m/s^2 until it reaches the top floor at 100m, calculate the shortest time it takes for it to reach the top floor (ignore gravitational acceleration, assume g=0). plo..
a mass of 10 kg is vertically accelerated from rest to 10 ms through a height of 100 m. the internal energy of the mass
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