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Why do you think it is important to control the position of a DC motor? Provide two examples for position control of electric motors.
a thermoelectric unit consists of n cells. when there is no temperature difference across the leads the resistance is 4
the 244000-lb space-shuttle orbiter touches down at about 230 mihr. at 193 mihr its drag parachute deploys. at 35 mihr
A Pitot-static probe connected to a water manometer is used to measure the velocity of air. If the deflection (the vertical distance between the fluid levels in the two arms) is 7.3 cm, determine the air velocity. Take the density of air to be 1.2..
A piston-cylinder arrangement holds a thermally perfect gas at p1=100kPa and T1 = 300K. Assume that cp = 1.0035 kJ/kg-K, cv = 0.7165 kJ/kg-K, and R = 0.287 kJ/
determine the temperatures of surface 1 through 4 of the furnace cavity of example 13.3 if the entire furnace
calculate the force required in direct extrusion of 1100-o aluminum y105 mpa from a diameter of 100mm in to 50mm.
a 20 cm diameter sphere is made of a heat-generating material that produces 106 wm3. the sphere is cooled by 20oc air
a pendulum consisting of a bob of mass m is suspended from a massless inextensible string of length l in a viscous
a brick wall 3 m high 7.5 m wide and 200 mm thick has a thermal conductivity of 0.7 wmcelcius. the temperature on the
3 kg of r22 in a piston-cylinder is initially at a pressure of 0.30 mpa and volume of 0.15m3. the system is then heated
Steam at 10bar and 0.95 dry flows at 130 m/sec in a pipe. It is throttled to 8 bar and the flow rate is 12 kg/sec. Assuming velocity in the pipe on the down stream side of the valve is 160 m/sec. Find the final condition of steam and the pipe diam..
what is the difference between the pressure inside a soap bubble and atmospheric pressure for a 3-in-diameter bubble?
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