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In the gear-pulling assembly shown the square-threaded screw AB has a mean radius of 15 mm and a lead of 4 mm. Knowing that the coefficient of static friction is 0.10, determine the couple that must be applied to the screw in order to produce a force of 3 kN on the gear. Neglect friction at end A of the screw.
A vertical piston-cylinder that initially has a volume of 0.2m^3 is filled with 0.2kg of air. The piston is weighed so that the pressure on the air is always maintained @ 2 bars. Heat transfer is allowed to take place until the volume is 75% of its i..
There are three basic laws in our study of ?uid mechanics: the conservation of mass, Newton's second law, and the ?rst law of thermodynamics. (a) State an integral quantity for each of the laws and (b) state a quantity de?ned at a point for each of..
for antoine equation in the formlog10vp a- btcwith vp in mm hg and t degree c the constants for n-pentane are a6.853
Two long, parallel conductors, separated by 10.0 cm, carry currents in the same direction. The first wire carries current I1 = 5.00 A and the second carries I2 = 8.00 A.
A 2-m^3 rigid tank contains refrigerant-134a vapor at 1.4 MPa, 180C. Determine the mass of the refrigerant in kilogram using:
what would be the effect on the calculated value of the vane efficiency for mass of jockey in error by 0.001 measurements.
Consider a mass going through a polytropic process where pressure is directly proportional to volume (n=-1) the process starts with P=0,V=0 and ends with P=600kPa,V=0.01m^3. Find the boundary work done by the mass.
Air at 12 psia and 60°F enters the jet engine of an aircraft flying at a velocity of 500 ft/s. Inlet area of the engine is 4 ft2. Exhaust gases leave the engine with a relative velocity of 900 ft/s. The fuel flow rate is only 2% of the mass flow rat..
What is bioremediation? Briefly discuss how it is accomplished for VOCs and for chlorinated hydrocarbons. What is natural bioremediation?
a car is climbing the hill of slope theta1 at a constant speed v. if the slope decreases abruptly to theta2 at point a
a bonding operation utilizes a laser to provide a constant heat flux q0 across the top surface of a thin
a power cycle operates between a high-temperature reservoir at temperature th and a lower-temperature reservoir at tl
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