Physics, 15.10.2019 01:00 corinaartsy
Air undergoes a polytropic process in a piston–cylinder assembly from p1 = 1 bar, t1 = 295 k to p2 = 9 bar. the air is modeled as an ideal gas and kinetic and potential energy effects are negligible. for a polytropic exponent of 1.4, determine the work and heat transfer, each in kj per kg of air, (1) assuming constant cv evaluated at 300 k. (2) assuming variable specific heats.
Answers: 2
Physics, 22.06.2019 05:00
Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct
Answers: 1
Physics, 22.06.2019 08:00
Gather reliable information to brent make his decision. to gather this information, use newspapers, call insurance companies or look at their web sites, and review consumer magazines and web sites. also, look at the manufacturer web site or for information about gas mileage. list the sources you use and take notes.
Answers: 1
Physics, 22.06.2019 15:50
The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.
Answers: 2
Air undergoes a polytropic process in a piston–cylinder assembly from p1 = 1 bar, t1 = 295 k to p2 =...
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