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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 fan that can provide air speeds up to 50ms is to be used in a low-speed wind tunnel with atmospheric air at 25 degc.
a piston-cylinder device contains 0.15kg of air initially at 2mpa and 350oc. the air is first expanded isothermally to
the number of women-years of exposure is less than for established methods and all available evidence should be
an engineer wishes to heat air for a shopping mall with 100000 kj of energy per hour. one option is to use steam
Air at 1000K and 400 kPa enters the insulated nozzle of a turbo-jet engine. Because the plane is flying at an altitude, the exit pressure is only 80 kPa. Calculate the exit velocity of the nozzle if its isentropic efficiency is 93%. Report answer in ..
a thin 1 mm thick ?-iron membrane at 250degc is subjected to an atmosphere of hydrogen gas on one side and the
Sketch a preliminary layout for the following heat exchanger systems. On the layout sketch indicate pipe work manifolds, access platforms, access for construction, operations and maintenance.
A piston-cylinder assembly contains 2 lbm of water, initially at 100 lbf/in.2 and 400o F. The water undergoes two processes in series: a constant pressure process followed by a constant volume process. At the end of the constant volume process, the t..
Water vapor enters a turbine operating at steady state at 1000°F, 140 lbf/in2, with a volumetric flow rate of 12.6 ft3 /s, and expands isentropic ally to 2 lbf/in2. Determine the power developed by the turbine, in hp. Ignore kinetic and potential ene..
an inward radial flow turbine is to develop 400 hp when supplied with air at 800c and 3 bar abs the exhaust total
a block of mass mb 5 kg is suspended from a cable of stiffness k 300 nm. the block is acted upon by a vertical force
How significant have advances in information and communication technologies since the late 1980's been on how we do business? And how have the major types of businesses that exist changed over this time?
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