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A handheld pump for a bicycle (Fig. P6.91) has a volume of 25 cm3 when fully extended. You now press the plunger (piston) in while holding your thumb over the exit hole so that an air pressure of 300 kPa is obtained. The outside atmosphere is at P0, T0. Consider two cases: (1) it is done quickly (∼1 s), and (2) it is done very slowly (∼1 h).
a. State the assumptions about the process for each case.
b. Find the final volume and temperature for both cases.
An in-ground swimming pool may have a leak. The 30-ft by 10-ft by 5-ft (depth) pool is filled on June 1. On June 13, a hose, flowing at a rate of 10 gallons per minute, is used to add water to the pool. The hose is turned off after 1 hour.
Does this law hold exactly for ideal-gas mixtures? How about nonidealgas mixtures?
the rigid bar abcd is supported by a pin at B and restrained by identical steel bars at C and D, each of area 250mm^2. if the temperature is increased by 80C, determine the force P that will cause the bar at c to be stress-free.
A Class I rural highway segment of 10 miles in level terrain has a base free-flow speed (BFFS) of 65 mph. The cross section has 12-ft lanes and 6-ft clear shoulders on both sides of the road.
A subway train is traveling at a speed of 45 miles/hour whenthe brakes are fully applied on the wheels of cars A and B, causing them to slide on the track
Given the following information, determine the required DO concentration in the treatment plant effluent discharge in order to ensure that at no point downstream the DO in the river drops below 4 mg/L
Calculate the density in g/cm^3 of Ba and its atomic radius.
A falling-head permeability test was carried out on a clay soil of diameter 100 mm and length 150 mm. In 4 minutes the head in the standpipe of diameter 5mm dropped from 680 to 350 mm.
Water pressurized to 3.5 x 105 Pa is flowing at 5.0 m/s in a pipe which contracts to 1/3 its former area. What is the pressure and velocity of the water after the contraction
Roof trusses such as the one shown are spaced 6 m apart in a long, rectangular building. During the winter, snow loads of up to 1 KN/m^2 (or 1 KPa) accumulate on the central portion of the roof. Find the force in each member for a truss not at the..
An equal tangent vertical curve is to be constructed between grades of -3.0% (initial) and 1.0% (final). The PVI is at station 110+00 and elevation 420 ft. Due to a street crossing the roadway, the elevation of the roadway at station 112+00 must b..
A process is normally distributed and in control, with known mean and variance, and the usual three-sigma limits are used on ?? control chart, so that the probability of a single point plotting outside the control limits when the process is in contro..
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