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1. The movable left-hand jaw of the bar clamp can be slid along the frame to increase the capacity of the clamp. To prevent slipping of the jaw on the frame when the clamp is under load, the dimension x must exceed a certain minimum value. For given values of a and b and a static friction coefficient µ,s, specify this design minimum value of x to prevent slipping of the jaw.
2. A uniform block of mass m is at rest on an incline (). Determine the maximum force P which can be applied to the block in the direction shown before slipping begins. The coefficient of static friction between the block and the incline is µ,s. Also deter- mine the angle /3 between the horizontal direction of P and the direction of initial movement of the block.
A parcel is lowered onto a conveyor belt that is moving at 4 m/s. If the coefficient of kinetic friction between the parcel and the belt is 0.25, calculate the time that it takes for the parcel to reach the speed of the belt.
a square flat plate 250-mm on a side is oriented 42deg from the vertical and suspended in quiescent air at 25degc. the
A solution is pumped through a 5cm diameter stainless steel pump.
At 45° latitude, the gravitational acceleration as a function of elevation z above sea level is given by g = a - bz, where a = 9.807 m/s2 and b = 3.32 x 10-6 s-2. Determine the height above sea level where the weight of an object will decrease by 1.4..
the aerodynamic resistance to motion of a car is nearly proportional to the square of its velocity. additional friction
trees at the bottom of a lake are approximated as a truncated cone with a base diameter of 6 ft a top diameter of 1 ft
A shell and tube heat exchanger with one shell pass and four tube passes is being analyzed to determine the heat transfer rate and the fluid outlet temperatures for prescribed flow rates and inlet temperatures. The cold fluid has a heat capacity rate..
a rigid tank is filled with refrigerant r-134a at 310 k. an electric current of 0.2 amps over 220 volts is passed
At what location s will the combined moment of the weights of the man and platform about point B be zero.
Consider a power plant operating on an ideal Rankine cycle without feed water heating. Steam enters the turbine saturated at 1000F at the rate of 5 x10 lbm/H. The turbine exhausts to a surface condenser at 1 psia. The condenser has an overall heat tr..
A piston-cylinder device contains steam that undergoes a reversible thermodynamic cycle. Initially the steam is at 400 kPa and 350C with a volume of 0.3 m^3. The steam is first expanded isothermally to 150 kPa, then compressed adiabatically to the in..
a packed bed is composed of crushed rock with a density of 175 lbmft3nbspof such anbspsize and shape that the average
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