The chopper controls a dc machine
The Chopper controls a dc machine with an armature inductance of 0.2mH. the armature resistance can be neglected. the armature current is 5A, switching frequency is 30kHz and diode voltage is 0.8?
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A 32.0-g sample of water at 290. K is mixed with 51.0 g water at 320. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
Determine the values of Q that minimizes unit sales cost UC = TC/Q; and compute the annual profit earned by the plant at this quantity.
A gas company charges $1.30 for 15.0 cubic feet of natural gas. (a) Convert this rate to dollars per liter of gas. (b) If it takes 0.304 cubic feet of gas to boil a liter of water, starting at room temperature (25 degrees C), how much would it cos
At the conclusion of the experiment, the total pressure in the flask is 652. torr. What is the pressure of N2 in the flask?
Calculate the value of the rate constant, What is the overall order of the reaction?
A spherical copper shell, of inside radius 5cm and wall thickness 1cm, loses heat to the surrounding air, which is maintained at 25C. The inside surface of the shell is maintained at Ti=100C.
A gas mixture contains each of the following gases at the indicated partial pressures: N2, 335 torr; O2, 124torr ; and He, 209 torr . What is the total pressure?
A compound contains 10.13% C, and 89.87% Cl (by mass). Determine both the empirical formula and the molecular formula of the compound given that the molar mass is 236g/mol
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