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A container filled with 97 kg of liquid water at 95ºC is placed in a 82-m3 room that is initially at 13ºC and 1 atm. Thermal equilibrium is established after a while as a result of heat transfer between the water and the air in the room. Using constant specific heats, determine (a) the final equilibrium temperature, (b) the amount of heat transfer between the water and the air of the room, and (c) the entropy generation. Assume the room is well sealed and heavily insulated?
A golf ball is driven off a tee that is elevated 30 ft above the fairway and hits the ground that is below 30 ft from the tee. The initial velocity of the ball is 120 ft/s at an angle of 40 degrees from the horizontal.
Calculate the rate of heat loss per foot and the thermal resistance for a 6-in. schedule 40 steel pipe covered with a 3-in. thick layer of 85% magnesia. Superheated steam at 300°F flows inside the pipe (hc = 30 Btu/h ft2 °F) and still air at 60°F is ..
a worm gear set has a velocity ratio of 0.05. the worm has two teeth a lead of 3 in. and a pitch diameter of 1.5in.
An oven door consists of a layer of asbestos sandwiched between a layer of steel on the inner surface and a layer of wood on the outer face
The x and y components of velocity for a two-dimensional flow are u = 5y ft/s and v = 4 ft/s, where y is in feet. Determine the equation for the streamlines. Use C as constant. Round all numbers in answer to 3 significant digits.
the average wind speed on the north texas plains around amarillo is approximately 6 ms. an efficient wind turbine can
Both cars undergo constant acceleration. Determine the time when the two cars pass each other on the highway.
two kilograms of zinc at 500c and 1 atmosphere is contained in a thermally insulated jacket. the system is compressed
in a single degree of freedom vibrating system the concentrated mas which weighs 38.6 lbs. is acted upon by a
hot air at 207 kpa and 200degc enters a 2.5-cm-id tube at 6 ms. the tube is constructed of copper with a thickness of
Consider a Refrigerant 22 at 0oC that is going through a phase change from the saturated liquid to saturated vapor. Using T-dS equations, calculate the entropy change between these two phases.
A wheel barrow is used to lift a 200 lb load. The length from the wheel axle to the center of the load is 2 ft. The length from the wheel and axle to the effort is 5 ft. 5. What is the ideal mechanical advantage of the system?
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