Physics, 27.06.2019 08:30 lilianajimva
Exhaust gases from a wire processing oven are discharged into a tall stack, and the gas and stack surface temperatures at the outlet of the stack must be estimated. knowledge of the outlet gas temperature tm o is useful for predicting the dispersion of effluents in the thermal plume, while knowledge of the outlet stack surface temperature ts'0 indicates whether condensation of the gas products will occur. the thin-walled, cylindrical stack is 0.5 m in diameter and 5 m high. the exhaust gas flow rate is 0.5 kg/s, and the inlet temperature is 500 degree c. the ambient air temperature is 4 degree c. calculations that are a little beyond where we are now in tf1 show that the average surface heat transfer coefficient in the outside surface is h0= 14 w/m2 k, and the inside heat transfer coefficient is hi= 10 w/m2 k. the thermal resistance of the stack wall itself may easily be neglected. estimate the outlet gas and stack surface temperatures for the given conditions.
Answers: 3
Physics, 21.06.2019 23:00
1point) a skydiver weighing 130 lb (including equipment) falls vertically downward from an altitude of 14,000 ft and opens the parachute after 20 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.85|v|0.85|v| when the parachute is closed and is of magnitude 17|v|17|v| when the parachute is open, where the velocity vv is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. find the speed of the skydiver when the parachute opens. speed is 150.6121788 ft/s find the skydiver's height when the parachute opens. height is 2338.98591 ft find the limiting velocity vlvl after the parachute opens. (think about whether this should be positive or negative.) vl=vl= 7.647 ft/s
Answers: 2
Physics, 22.06.2019 09:00
An open cart is moving along a straight frictionless horizontal track. when rain starts falling vertically into the cart, what happens to the speed of the cart?
Answers: 3
Physics, 22.06.2019 14:00
Often called simply "velocity," this is the velocity of an object at a particular moment in time.
Answers: 1
Exhaust gases from a wire processing oven are discharged into a tall stack, and the gas and stack su...
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