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Consider two identical rooms: one room has a refrigerator in it, the other does not. All the doors and windows in each room are closed and both rooms are well insulated. The refrigerator is turned on and the door of the refrigerator is shut. Each room is then left unoccupied for 8 hours.Determine, providing detailed reasoning,
(a) If one room will be warmer than the other. If so, which room will be the warmest?
(b) If the experiment above is repeated, but this time the door on the refrigerator is left open, will one room be warmer than the other and if so, which room?
the collar has a mass of 20kg and is supported on the smooth vertical rod. the attarched springsare undeformed when d=0.5m determine the speed of collar after the applied force F=100N causes it to be displaced so that d=0.3m when d=0.5m, the colla..
energy is added to a piston cylinder arrangement, and the piston is withdrawn in such a way that the quantity PV remains constant. the initial pressure and volume are 200kpa and 2m3, respectively. the final pressure is 100kpa, calculate the work d..
Using the ideal gas model with specific heat ratio, k = 1.4, and ignoring potential energy effects, determine (a) the exit velocity, in m/s, and (b) the rate of heat transfer, in kJ per kg of gas flowing through the nozzle.
The unit cell for uranium has orthorhombic symmetry with a, b and c lattice parameters of 0.286, 0.587, 0.495 nm, respectively. If its density, atomic weight, and atomic radius are 19.05 g/cm3, 238.03 g/mol, and 0.1385 nm, respectively, compute th..
For this same component and alloy, compute the stress level at which fracture will occur for a critical internal crack length of 6.0mm.
Draw the T-s diagram (hint: it would help to begin with a schematic of the cycle) and.
A spur gear has 48 teeth with a diametral pitch of 8 and a pressure angle of 20 deg. The face width is 0.75 inches. If the gear is transmitting 25 HP at 250 rpm
a helical spring of stiffness k is cut into two halves and a mass m is connected to the twonbsphalves as shown below
consider a well insulated container of total volume v.a initially the container is divided into 2 equal parts using a
A bullet is fired horizontally into a wood block resting on a horizontal, frictionless surface. If the mass of the bullet is 0.02 Kg and the velocity is 600 m/s
Carbon dioxide enters an adiabatic compressor at 100kPa and 300K at a rate of 0.5kg/s and exits at 600kPa and 450K. Considering constant specific heat, determine (a) isentropic efficiency of the compressor (b) the rate of entropy change in (kW/K) ..
A motorist enters a freeway at 36 kph and accelerates uniformly to 90 kph. From the odometer in the car, the motorist knows that she traveled 0.20 km while accelerating. Determine a.) the acceleration of the car, b.) the time required to reach 90 ..
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