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The speed of the brake drum shown is controlled by a belt attached Problems to the control bar AD. A force P of magnitude 25 lb is applied to the control bar at A. Determine the magnitude of the couple being applied to the drum, knowing that the coefficient of kinetic friction between the belt and the drum is 0.25, that a = 4 in., and that the drum is rotating at a constant speed
(a) counterclockwise,
(b) clockwise.
a high strength steel drill rod used for boring a hole in the earth has a diameter of 0.5 in. the allowable shear
helium gas expands in an adiabatic turbine from 2 mpa and 750degc to 0.18 mpa at a rate of 1.5 kgs. assuming constant
Air contained in a rigid, insulated tank fitted with a paddle wheel, initially at 4 bar, 40oC and volume of 0.2 m3, is stirred until its temperature is 500 K. Assuming the ideal gas model for the air, determine the amount of entropy produced, in kJ/K..
The power output of a non-ideal gas turbine cycle having a compressor thermal efficiency of 80% and a turbine thermal efficiency of 90 %., open-cycle gas turbine cycle is 75 MW and its pressure ratio is 16. Air enters the compressor at 520 R and ente..
consider a gas-turbine cycle with two stages of compression and two stages of expansion. the pressure ratio across each
a 300kg compressor is placed at the end of a cantilever beam of length 1.8 m made of a material with an elastic modulus
design an al-si brazing filler alloy that will be used to join an al-mg alloy. the al-mg alloy has a solidus
Moisture in the ambient air will result in frost forma- tion on the container, causing the surface emissivity to increase. Assuming the surface temperature and convection coefficient to remain at -10°C and 10 W/m2 · K, respectivel..
the compound beam is fixed at a and supported by a rocker at b and c. there are hinges pins at d and e. take f 14kn.
A two-stage compressor is used to compress air from 100 kPa at 298 K to 900 kPa at a rate of 0.5 kg/s. After the first stage compressor, an intercooler isobaric ally cools the air to 350 K before entering the second compressor stage.
a cylinder fitted with a piston is filled with 600 lb of saturated liquid ammonia at 45degf. the piston weighs 1 ton
develop algorithms for the explicit solution of the kinematic equations when applied to a problem of runoff from a
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