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A band brake is in contact with drum C through an angle of 180° and is connected to the horizontal lever at A and B, as shown. The drum diameter is 16 in. The coefficient of kinetic friction between the brake band and the drum is 0.40. Force P is 90 lb. Determine the tensions at A and B in the band brake if the drum is rotating
a. clockwise
b. counterclockwise
an otto cycle uses air as the working fluid its state at the beginning of the compression is 14 psia and 60 f its
a in a short section of a channel carrying a steady discharge of 36 m3s the depth is seen to increase from 1.6 m to
Saturated moist air and condensate streams exit the dehumidifier unit at the same temperature. The moist air then passes through a heating unit, exiting at 248C, 1 bar, and 40% relative humidity. Neglecting kinetic and potential energy effects, de..
a 200 kg lander is approaching mars. assume a gravitational acceleration of 3.7 ms2. at the illustrated instant h 15 m
a solid cylinder 100 mm in diameter generates heat at a uniform rate of 7 x 106 wm3. the thermal conductivity of the
a study is to be made using liquid ammonia as the fuel in a gas-turbine engine. consider the compression and combustion
Apparatus that liquefies helium is in a laboratory at 296 K. The helium in the apparatus is at 4.0 K. If 150 mJ of heat is transferred from the helium, find the minimum amount of heat delivered to the laboratory.
an in-line tube bank is constructed of 1 inch diameter tubes with 15 rows transverse to the flow 7 rows in the floe
For the Refrigerant 134a stream, determine the rate of heat transfer, in kJ/h. For each of the streams, evaluate the change in flow exergy rate, in kJ/h, and interpret its value and sign.
a solid circular shaft and a tubular shaft both with the same outer radius of cc0 0.600 are being considered for a
A 90N force is applied to control rod AB as shown. Knowing the length of the rod is 225mm, determine the moment of the force about point B by resolving the force into components along AB and in direction perpendicular to AB?
Use cold air properties to find the highest cycle pressure, the specific energy added by combustion, and the mean effective pressure.
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