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A centrifugal clutch has four shoes, each of mass 0.3 kg. When at rest the radial clearance between the shoes and the clutch drum is 5 mm and the radius to the centre of gravity of the shoes is 195 mm. The shoes are held on retaining springs of stiff ness 8 kN m 1 and the internal diameter of the clutch drum is 500 mm. The coefficient of friction between the shoes and the drum is 0.2. Determine for a rotational speed of 1000 rpm (a) the radial force which each shoe exerts on the drum, (b) the torque transmitted, (c) the power transmitted.
steam leaves a power plant steam generator at 3.5 mpa 400degc and enters the turbine at 3.4 mpa 375degc. the isentropic
A person with glasses enters a heated room at 22oC, after spending some time in the cold (the glasses are at 1oC). The glasses start to fog. Find the minimum value of the relative humidity in the room.
a refrigerant 134a at 140 kpa and -10 degree celcius is compressed by an adiabatic 16kw compressor to an exit state of
Gaseous propane at 77 oF is mixed with air at 300oF and ignited. What percentage theoretical air must be used if the temperature of the products is 1700oF? Assume an adiabatic process.
A piston cylinder contains 0.25 kg of water initially at 1.4 bar and 0.06 m^3. If 250 kj of heat is transferred to the water while keeping pressure constant:
saturated liquid water at 8.58mpa undergoes a reversible isothermal process in a cylinder until the pressure reaches
a pilot flying a new airplane reports that she is flying at 49000 ft as read on her altimeter that is referenced to
suppose that the mass in a mass-spring-dashpot system with m10 c9 and k2 is set in motion with x00 and x05 a find the
The Prony brake shown in Figure 2 is commonly used in torque measurement. The rope is wound round the brake drum mounted onto the shaft. One end of the rope carries a dead load of weight W and the other end is attached to a spring balance
water flows into an 9.0 diameter section of a piping system then it exits from 3.0 x 4.0 rectangular section. the speed
The tensile strength of iron-carbon alloys increases as the percent carbon increases up to about 1.5 to 2%. Above this the tensile strength drops rapidly with increased percent carbon. Speculate about the nature of this abrupt change.
an undeformed specimen of some alloy has an average grain diameter of 0.04 mm. you are asked to reduce its average
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