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A squirrel cage motor produces 1100 pound feet of torque at starting when full voltage is applied to the motor. If the voltage is reduced to 50% during starting, how much starting torque will the motor develop?
create a seven by seven matrix with random numbbers between 1 and 70. outpput a vector of the difference between the
The lock is 8 m wide. Calculate the resulting forces on this pair of doors, and draw a free-body diagram of this pair of doors showing the opposing pressure distributions
Two-element array. A Hertzian dipole antenna is placed horizontally above a perfectly conducting ground at a height h.
hot air steadily enters a gas turbine at 5 bar 900 k and exits at 1 bar 600 k and a velocity of 100 ms. the mass flow
Would the expected utility of consumers be improved by the announcement, where the expectation is calculated from the point of view of a moment before the announcement was made?
a car air conditioning system operates with r-134a in the peak summer outside at 100degf and inside desired at 77degf.
the thin-walled pipe has an inner diameter of 0.5 cm and a thickness of 0.025 cm. if it is subjected to an internal
use constant specific heats at room temperature. round your final answers to the nearest integer. an otto cycle uses
The power unit A of the tractor-scraper has a mass of 4 Mg with mass center at G1. The fully loaded trailer-scraper unit B has a mass of 24 Mg with mass center at G2. Positioning of the scraper is con- trolled by two hydraulic cylinders EF, one on..
Air undergoes a poly tropic process in a piston-cylinder assembly from P1 = 1 atm, T1 = 70ºF to P2 = 3 atm. Employing the ideal gas model with constant specific heats at 80ºF, determine the work and heat transfer per unit mass, in Btu/lbm, if
a 20 mw radial flow hydraulic turbine is to be designed with a head of 70 m and a speed of 90 rpm. a geometrically
a piston-cylinder device contains 12 kg of saturated vapor r-134a at 2.4 bar state 1. a 110 v electric source supplies
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