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Find the magnitude of the angular momentum of the second hand on a clock about an axis through the center of the clock face. The clock hand has a length of 15.0 cm and a mass of 6.00 g. Take the second hand to be slender rodrotating with constant angular velocity about one end.
A refrigeration cycle maintains a clean room at 68oF by removing energy entering the room by heat transfer at the rate of 0.21 Btu/s. The cycle rejects energy by heat transfer to the outdoors where the temperature is 80oF.
a 600 mw coal-fired power plant has an overall thermal efficiency of 38. it is burning coal that has a heating value of
the golf ball is hit at a with speed of v40ms and directed at an angle of 30 degrees with the horizontal. determine the
a cylindrical fuel rod has a linear power rating of 467 wcm. the radius of the fuel is 1.3 cm. the gap thickness is
a steady flow of liquid ethylene glycol inside finned tubing is cooled from an inlet state of 85c and 2000kpa to an
air is expanded in an adiabatic nozzle by a reversible polytropic process with n 1.3. it enters this nozzle at 100
a pump draws water from a reservoir through a 150 mm diameter suction pipe and delivers it to a 75 mm diameter
A valve in a cylinder has a cross sectional area of 11 cm2 with a pressure of 735 kPa inside the cylinder and 99 kPa outside. How large a force is needed to open the valve?
Two pipes containing air are connected with two manometers, as shown in the figure. One manometer contains glycerine, and the difference in liquid levels is 10 cm. The other manometer contains an unknown fluid, and it shows a difference in liquid lev..
water is the working fluid in an ideal rankine cylce. saturated vapors enters the turbine at 16mpa and the condensor
air as an ideal gas is compressed from a state where the pressure is 0.1 mpa and the temperature is 27o to a state
a vintage automobile has an intake manifold vacuum gage in the dashboard instrument cluster. cruising at 20.1 ms 45 mph
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