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At steady state, a 15-W curling iron has an outer surface temperature of 90°C. For the curling iron, determine the rate of heat transfer, in kW, and the rate of entropy production, in kW/K.
heat in the amount of 500kj is transferred directly from a hot reservoir at 727oc to a cold reservoir at 327oc.
Bypass air exits at 600 m/s while combustion air exits at 1000 m/s. What is the thrust in kN of this engine?
The 8-lb block slides in a frictionless slot that lies in the vertical plane. The stiffness’s of springs A and B attached to the block are kA =40 lb/ft and kB= 20 lb/ft. When the block is in position 1, spring A is compressed 0.5 ft and spring B is u..
if the head loss in 30 m 100 ft of 75 mm 3 in. pipe is 7.6 m 25 ft when a certain quantity of water flows therein what
Freshwater is impounded to a height of 11 ft behind a dam as shown. Determine the magnitude and location of the resiltant force on the 4-ft by 4-ft gate.
A 2m^3 rigid insulated tank initially containing saturated water vapor at 1 MPa is connected through a valve to a supply line that carries steam at 400C. Now the valve is opened, and steam is allowed to flow slowly into the tank until the pressure in..
An ideal Ericsson engine using helium as the working fluid operates between temperature limits of 550 and 3000 R and pressure limits of 25 and 200 psia. Assuming a mass flow rate of 14 lbm/s determine
a 50-kg iron block and a 20-kg copper block both initially at 80oc are dropped into a large lake at 15oc. thermal
consider a house in winter. it is heated by the sun at a rate of 2 kw. electrical appliances in the house are drawing
if silcion is cooled quickly it will form glass instead of crystallyzingone way to do this is to deposit si atoms onto
consider a pistoncylinder arrangement that has a linear spring mounted such that as the piston rises to a certain point
A sphere 1 m in diameter floats half submerged in a tank of oil( Sg = 0.80). a.) What is the upward force acting on the sphere? b.) What is the minimum weight of an anchor w/ a density of 20,000 N/m^3 that will be required to submerge the sphere comp..
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