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An open-ended mixing drum is a thin cylinder of length 1.3 m, diameter 600 mm and wall thickness 5 mm. The drum is made from steel of density 7800 kg m 3 . A driving torque of 55 Nm accelerates the drum uniformly from rest to a speed of 3600 rpm against a friction torque of 5 Nm. Determine (a) the moment of inertia of the drum, (b) the angular acceleration, (c) the time taken, (d) the work done, (e) the average power developed by the driving motor.
determine the density specific heat and thermal conductivity of a lightweight aggregate concrete mix that is composed
A spherical buoy, having a diameter of 1.5 m and weighing 8500 N, anchored to the floor of a lake by a cable. Determine the force extorted by the cable, in N. The density of the lake water is 10^3kg^3/m^3 and g = 9.81m/s^2.
air in contained in a vertical cylinder fitted with a frictionless piston and two sets of stops. the volume is .05m3
A counter flow cooling tower cools 2000 gal/min water from 104 F to 85 F with 210,000 ft^3/min of air at 90 F Dry bulb Temperature and 76 F WBT . The Mass transfer coefficient -surface area product is hA= 123lbm/hr ft^3. Air mass flow rate per unit c..
an arrow is shot straight up in the air with an initial speed of 210 fts. if on striking the ground it embeds itself
measurements are made on a particular part. the results are approximately normally distributed with a mean of 1.250
an air conditioner in the airport of timbuktu runs a cooling system using r-410a with a high pressure of 1500 kpa and a
the 500 lbf motor is supported on springs with a total stiffness of 5000 lbfin. the springs have a damping ratio of
a home buyer can afford to spend no more than 1500month on mortgage payments. suppose that the interest rate is 6 that
A large plastic casting with thermal diffusivity 6.0 x10^7 m2 /s is removed from its mold at a uniform temperature of 150 degrees C. The casting is then exposed to a high-velocity air stream such that the surface experiences a sudden change in temper..
A shell-and-tube heat exchanger is used to cool a flow of steam using a stream of cooling water. The steam enters the heat exchanger at 0.1 bar and a quality of 91% (state 1), and exits as a saturated liquid at the same pressure (state 2). The mass f..
water flows at a rate of .04 m3s in a .12 meter diameter pipe that contains a sudden contraction to a .06 m pipe.
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