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The hydraulic dredge shown in Fig. P5.51 is used to dredge sand from a river bottom. Estimate the thrust needed from the propeller to hold the boat stationary. Assume the specific gravity of the sand/water mixture is SG = 1.4.
State whether each member is in tension or compression.
air at the rate of 18 kgs is drawn into the compressor of a jet engine at 55 kpa and -23oc and is compressed reversibly
1 one mole of a monatomic ideal gas is subjected to the following sequence of stepsa. starting at 300 k and 10 atm the
Determine the forces in members BC and FG of the loaded symmetrical truss. Show that this calculation can be accomplished by using one section and two equations, each of which contains only one of the two unknowns.
a copper vertical plate that is 0. 305 m tall and 1. 5 m wide separates two large air spaces. the air space at the left
An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire) and of length 2.4 m (8 ft ) is connected to an electric heater which draws 16.0 A on a 120-V line.How much power is dissipated?
Display your results graphically, showing also the effect of variations in the emissivity by considering values of 0.20 and 0.30.
in an air standard regenerative gas turbine cyclethe pressure ratio is 5.air enters the compressor at 1 bar 300 k and
At a temperature of 21°C, a cold-rolled red brass [alpha B = 17.6 x 10-6/°C] sleeve has an inside diameter of dB = 314.70 mm and an outside diameter of DB = 325 mm. The sleeve is to be placed on a steel [alpha S = 11.9 x 10-6/°C] shaft with an outsid..
The USEIA reported that in 2011, the average American household consumed 11,280 kWh for the year. On the outskirts of a small city, an energy company has constructed a single, large wind turbine (blade diameter 30 m). A typical average wind speed ove..
A scissors jack is used to lift a load W. The links of the jack are rigid and the collars can slide freely on the shaft against the springs of stiffnesses k1 and k2 (see Fig. 2.63). Find the natural frequency of vibration of the weight in the vert..
Subject a piece of steel to a case hardening process in which carbon is forced by diffusion through a layer on the surface of the piece. For this purpose, the piece of steel will be placed in a carbon-rich atmosphere in a special furnace.
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