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Select an appropriate pipe diameter and size of pump using Fig. 10.3 to deliver water at Q ¼ 250 m3=h between two reservoirs. The maximum allowable pipe velocity is 3 m=s, the length of the line is 1500 m, and the difference in elevation between the reservoirs is 30 m. Assume f ¼ 0.02 and K ¼ 0.5.
A long rectangular bar 20 mm wide and 10 mm thick made of hot-rolled 4340 carbon steel (Sy = 860 MPa, K1c = 99 MPaÖm), is found to have a centrically located through-thickness crack 8mm wide. Is it best to a) leave the crack alone, b) drill a 5 mm di..
part-1suppose that a simple pendulum is attached to our spring-damper-mass system. a simple schematic of the model is
the electric power needs of a community are to be met by windmills with 10-m-diameter rotors. the windmills are to be
A child releases a helium-filled party balloon. It is filled with low-quality helium so that the net specific gravity (compared to ambient air) is 0.15, including a small allowance for the the light balloon shell. Its initial acceleration oppos..
a 250-kg crate b is suspended from a cable attached to a 20-kg trolley a which rides on an inclined i-beam as shown.
derive the model equation mass and temperature for a cstr reactor with a first order reqaction a product. assume
Benzene, p= 54 lb/ft^3 at 100 F is pumped at a rate of 40 gpm. The reservoir is open to atmosphere and below the pump centreline by 4 ft. The discharge line is 10 ft above the pump centreline. The gage at discharge reads 50 psig. The discharge line i..
A closed, rigid tank fitted with a paddle wheel contains 0.1kgof air, initially at 300 K, 0.1MPa. The paddle wheel stirs the air for 20 minutes, with the power input varying with time according to W = -10t, where W is in watts and t is time, in minut..
A sandbag is dropped from a balloon which is ascending vertically at a constant speed of 6m/s. If the bag is released with the same upward velocity of 6m/s when t=0s and hits the ground when t=8s, neglecting air resistance,
the inner and outer surfaces temperatures of a 0.5-cm thick 2-m x 2-m window glass in winter are 100c and 30c
a horizontal circular cylinder of diameter d 0.2m and length 2m is elastically mounted on two springs and towing tank
A single-stage ideal regenerative steam cycle has a boiler pressure and temperature of 5000 kPa and 500 C, and a condensing pressure of 10 kPa. The extraction pressure is 500 kPa.
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