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Measurements of the diameters of a random sample of 200 ball bearings made by a certain machine during one week showed a mean of 0.824 inches and a standard deviation of 0.042 inches. Find the bounds of a 98% confidence interval for a mean diameter of all the bearings.
the two blocks in the figureoscillate on a frictionless surface with a period of 1.7 s. the upper block just begins to
initially 1.361 kg of steam is contained in a piston-cylinder device at 260 oc with a quality of 0.7. determine the
two solid cylinders rods AB and BC are welded together at B and loaded. determine the magnitude of the force P for which the tensile stress in rod AB is twice the magnitude of the compressive stress in rod BC?
sketch a diagrammatic pneumatic circuit for the control of a double acting cylinder using a 52 valve that is
ammonia vapor flows through a valve. it enters the valve at a pressure of 8 bar and a temperature of 120c and after
a small household refrigerator is used to cool 20 liters of water initially at 22 degrees c. the cop of the
sun a 5800 k transfers heat to earth at an average rate of 1360 w per m2 of surface area of earth. the earth has a
solid particles having a size of 0.18 mm a sphericity shape factor of 0.91 and a density of 1090 kgm3 are to be
geothermal energy systems extract heat that is stored below the earths crust. for every 300 ft below ground the
Two collars C and D move along the vertical rod as shown. Knowing that the velocity of collar C is 50 in/s downward, find the instant centers of all three bars, the angular velocity of AB, the velocity of collard D.
initially an insulated rigid tank contains 3.73 kg of water at 240oc and 1 mpa. a heater in the wall of the tank
it is proposed to heat a home using a heat pump. the rate of heat transfer from the house to the environment is 15 kw.
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