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A steel cylinder initially contains nitrogen gas at 200kPa and 25oC. the cylinder is connected to a suply line containing nitrogen at 800kPa and 25oC. A valve is opened, allowing nitrogen to flow into the cylinder until the pressure reaches 800kPa. The cylinder internal volume is .1 m3 its mass(cylinder only) is 50 kg, and its specific heat is 0.43 kJ/kg*K. Find the final mass of nitrogen in the tank and the final temperature of the nitrogen assuming constant specific heats at room temperature for nitrogen, and
A.) no heat tranfer from the nitrogen to the tank, and
B.) rapid heat tranfer between the nitrogen and tank such that the cylinder and nitrogen remain in thermal equilibrium during the process (with negligable heat tranfer from the cylinder to its external surrounding.)
A rotating shaft with an applied torque of 400 Newton-meters is held in place (stopped) by a shaft key. The diameter of the shaft is 15 centimeters. The shaft key has a length of 20 cm, and is square, with its width and height being 5 cm.
What is the highest downward speed (the terminal velocity), in miles per hour, ? At the terminal velocity the downward force (the weight) is equal to the upward force (the aerodynamic drag force).
The specification for a particular application calls for the blocks to have a mean compressive strength greater than 1350 kPa. A sample of 100 blocks is produced and tested.
Stormwater controls are typically designed by civil engineers. Stormwater is collected in pipes below the ground and routed to nearby surface water.
Traffic data collected at the same time indicated an average time headway of 4 sec. Determine the (a) density on the highway (b) flow on the road (c) space mean speed.
Determine: a. the Level of Service for this segment; b. the loss in Level of Service, if due to construction the lane width is reduced to 10 feet and there are concrete barriers one foot away from either end of the pavement.
At a given point on a horizontal streamline in flowing air, thestatic pressure is -2 psi (ie vacuum) and velocity is 150 ft/s.Determine the pressure at a stagnation point on thatstreamline?
An aquifer is 45 meters deep and has a well that pumps water at 850 cubic meters per day. One observation well is located 45 meters away and has a water surface that is 44.35 meters above the bottom of the aquifer.
f the design speed of a multi-lane highway is 60 mph, what is the minimum sight distance that should be provided on the road if (a) the road is horizontal and (b) the road has a maximum grade of 5 percent
You fill a 2 cubic foot wheelbarrow to the top with aggregate. If the specific gravity of the aggregate is 2.548 and 18% of the aggregate is void spaces, how much does the aggregate in the wheelbarrow weigh
For Hartford civic center roof collapse disaster. What possible corrective actions could have been implemented to prevent this failure? explain in your own words.
A train 552 m long is moving on a straight track with a speed of 88.5 km/h. The engineer applies the brakes at a crossing, and later the last car passes the crossing with a speed of 13.7 km/h.
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