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Consider 0.8 grams of air (which may be assumed to be an ideal gas) at 295 K and 1.5 bar trapped in a rigid tank. An electrical heater is operated for 30 seconds. During this time the voltage across the heater is 12 V and 0.6 amps pass through the resistance element. During this process, 126 J of energy is lost via heat transfer through the tank walls.
Assuming the specific heats of air are constant (at the 300 K values (use table B.9)) determine the final temperature of the air. Hint: Use the prop. relationships.
Determine the final pressure in the tank.
the motion of the slender 10kg rod AB is guided by collars of negligible mass that slide freely on the vertical and horizontal rods. knowing that the bar is released from rest when θ=30, determine the velocity of the collars A and B when θ = 60.
two hydrolic cylinders are connected in series as follows. the rod side port of cylinder 1 is connected to the piston
a certain factory manufactures tin cans.it receive an order for 10000 cylindrical tin cans of height 5 inch and
What is the mass of the lead weight, if 100 J of heat is lost from the water after the weight falls a distance of 3 m.
the overall volume compression ratio of a reversed carnot cycle working with air as a refrigerant is 10. the
A Boeing 747 is flying at M = 0.7 at an altitude where the temperature is 223.15 K. The density is 0.41268 kg/m3, and the pressure is 26429.7 Pa. The pressure coefficient on a point of the wing is -2. a) Calculate V0. b) Calculate the pressure (in Pa..
an oxygen enrichment device is needed for people with impaired respiratory systems. to design such a device it is
a 12-ft3 rigid tank contains refrigerant-134a at 40 psia and 55 percent quality. heat is transferred now to the
describe the relationship between microstructure scale and material properties. provide an example for how
The reciprocating radial roller follower of a plate cam profile with 0.7 in offset is to rise 2 in with simple harmonic motion in 180 degrees of cam rotation and return with simple harmonic motion in the remaining 180 degrees. If the roller radius is..
the structural engineering design section within the engineering department of a regional natural gas corporation has
water is pump from a lake to a storage tank at 18m above at a rate of 70 L/s while consuming 20.4 kW of electric power. disregarding any frictional losses in the pipes and any change s in kinetic energy, determine (a) the overall efficiency of the..
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