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A piston cylinder arrangement has an impeller protruding through the wall so that mechanical work can be done on the system. The piston weighs 15 lbf and is a circular disk with a diameter of 4 inches. The cylinder contains 1lbm of air initially at 537R that is heated to 640R by 17 Btu heat addition and shaft work. If the change in internal energy for the air is 25 Btu/lbm, how much shaft work was done by the impeller? Note: the air obeys the relation that pV=mRiT. Note: the MW of air can be assumed to be 29 lbm/lbmole and the specific gas constant for air is Ri = 53.34 ft lbf/lbmR
a projectile is launched from point a and lands on the same level at d. its maximum altitude is h. determine and plot
consider a magnet moving in a coil of n turns. this system can be modelled as mass spring damper system. the damping
The thermal-energy capacity of the lake is very large
a closed tank has an enclosed airspace above the surface of water which fills the tank to a depth of something over a
A 250mm long brass bar (CTE = 20.5X10-6 / 0 C) is being supported as shown below. Initially, when the temperature is 15 deg C, there is a total clearance of 0.25mm between the right end (left end is secured to the left side support) of the bar and th..
consider a stream power plant that operates on the ideal reheat rankine cycle. the plant maintains the boiler at
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one-fourth kg of a gas contained within a piston-cylinder assembly undergoes a constant pressure process at 5 bar. the
an ideal gas at 100 kpa and 15 degrees c enters a steady-flow compressor. the gas is compressed to 600 kpa and 10 of
where k is the coefficient of kinetic friction between the blocks and the ground. Also, what is the distance the blocks slide on the surface before they separate?
motion with wind stress rotation and friction in the following you may use these values if neededmiddot density
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