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1. A piston/cylinder contains air at 2500 R, 2200 lbf/in.2, with V1 = 1 in.3, Acyl = 1 in.2, as shown in Fig. P6.92. The piston is released, and just before the piston exits the end of the cylinder, the pressure inside is 30 lbf/in.2. If the cylinder is insulated, what is its length? How much work is done by the air inside?
2. A 25-ft3 insulated, rigid tank contains air at 110 lbf /in.2, 75 F. A valve on the tank is opened, and the pressure inside quickly drops to 20 lbf/in.2, at which point the valve is closed. Assuming the air remaining inside has undergone a reversible adiabatic expansion, calculate the mass withdrawn during the process.
compute the constant force P exerted by the catapult on the airplane during the 75-m travel of the launch carriage.
How much heat must be transferred to the helium before the piston starts rising?
A container of petrol on a set of scales is used to measure the rate at which fuel is used by an engine under test. In one test the weight measured by the scales decreases by 25.0 N in 1 hour.
The specimen was 8 cm in diameter and had a length of 85 mm. The area of the standpipe was 0.45 cm^2. Compute the coefficient of permeability of the soil in cm/s, m/s, and ft/d. What was the probable classification of the soil tested
Neglect the friction and mass of the small rollers.
The traffic light shown in Figure 3 is supported by a system of cables. Points A and B are in a vertical plane which is parallel to x-z plane. Point C is in y-z plane. The traffic light has a mass of 75 kg.
One kilogram of air (which behaves as an ideal gas) in a piston-cylinder assembly is subjected to two separate processes from the same initial to the same final state: at the initial state the air has a volume of 1,000 L, a pressure of 10^5 N/m2,
The moist unit weight of a soil is 119.5 pcf. For a moisture content of 12% and Gs=2.65, calculate the following;
Suppose a drainage basin has an area of 288 acres with a CN=55(Runoff Coef. of 0.30). Determine the peak discharge (in cfs) that would result from a 6.0in., 24-hr assuming there are no ponds and swampy areas.
Does the area enclosed by the cycle on a T-s diagram represent the net-work input for the reversed Carnot cycle?
Soil is excavated from a borrow to construct an embankment with a net volume of 50,000 cy. This is performed by compacting 12-in layers of the soil to a dry weight of 110 pcf at a moisture content of 18%.
Determine the height "h" on the wall to which the firefighter can project water from the hose...and the speed of the water at the nozzle is v= 55ft/s. The firefighter is holding the hose 3.5 ft from the ground and the wall is located 15ft from the..
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