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Ten grams of computer chips with a specific heat of 0.3 kJ/kg dot K are initially at 15 degrees C. These chips are cooled by placement in 5 grams of saturated liquid R134a at -38 degrees C. Presuming that the pressure remains constant while the chips are being cooled, determine the entropy change of the chips, then determine the entropy change of the R134a and then determine the change of the entropy of the entire system. Is this process possible? Why or why not?
the 2-lb box has a velocity of 5 fts when it begins to slide down the smooth inclined surface at a. the coordinates of
a large sphere i25mr2 rolls without slipping pure rolling across a horizontal surface. the sphere has a constant
consider a regenerative rankine cycle with a 600c and 4-mpa throttle a 5-kpa condenser and an open feedwater heater at
a new alloy used for construction of artificial hops is co20cr10mo. calculate the mpole fractions and mass fractions of
water is converted in a boiler from saturated liquid at 500 kpa to superheated steam at 500 kpa and 300c. find the
a frictionless piston is raised by slowly heating the gas contained in the cylinder. the initial pressure is 2 bar and
Estimate the rate of heat loss per metre length of pipe and explain why the thermal resistance of the pipe wall can be ignored.
the beam ab is subjected to the uniformly distributed load shown and to two unknown forces p and q. knowing that it has
a gate with a circular cross section is held close by a lever 1 m long attached to a buoyant cylinder. the cylinder is
a 960 N.m moment is required to straghten a post. if the capacity of a winch puller is 2400N, determine the minimum value to create the specified moment.
1. a diesel cycle operates with a compression ratio of 15 and a cutoff ratio of 2.5. what is the rate of heat input
1.water flows at 50oc inside a 2.5-cm-inside-diameter tube such that hi 3500 wm2 oc. the tube has a wall thickness of
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