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An object of mass 10 kg, initially at rest, experiences a constant horizontal acceleration of 4 m/s^2 due to the action of a resultant force applied for 20 s. Determine the total amount of energy transfer by work in kJ.
at steady state. a power cycle generates 100 mw of electricity while discharging energy by heat transfer at a rate of
a large fireplace in a ski lodge has a glass firescreen which covers a vertical opening in the fireplace. the opening
consider a thin walled cylindrical tank having a diameter of 2 ft and a height of 5 ft. the tank is initially filled to
a piston-cylinder device contains steam initially at 1 mpa 450degc and 2.5 m3. steam is allowed to cool at constant
a steel rod with a diameter of 2 cm length l25cm thermal conductivity of 50 wmk is exposed to ambient air at 20c. heat
a container of air with a fixed volume of 1 ft3develops a slow leak. the container originally is at 900 degrees at
a heat pump has a second law efficiency of of 74. it supplies heat to a room at a rate of 46000 btuhr in order to
a steam power plant operates near a river triver27degc. and uses the river as a temperature reservoir into which it
In 1975 the roof of Montreal's Velodrome, with a weight of 360 kN, was lifted by 10 cm so that it could be centered. How much work was done on the roof by the forces making the lift?
the flow rate of liquid metal into the downsprue of a mold 1 ls. the cross-sectional area at the top of the sprue 800
a rigid well-insulated tank contains 3 kg of a 2-phase liquid-vapor mixture of water initially at 200 kpa with a
consider an r-134a compressor on a refrigeration system. if the refrigerant enters as saturated vapor at 200 kpa 0.03
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