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A motor is designed to operate on 117 V and draws a current of 15.0 A when it first starts up. At its normal operating speed, the motor draws a current of 2.55 A. Obtain
(a) the resistance of the armature coil,
(b) the back emf developed at normal speed, and
(c) the current drawn by the motor at one-third normal speed.
A slide projector has a lens of focal length 150 mm. An image of 100 cm by 100 cm is formed of a slide whose dimensions are 50 mm by 50 mm
A circuit consists of a 0.15 microF capacitor, a 600 ohm resistor, and a 70 mH inductor in series. Calculate the rms current flow
A rod of length l and uniform mass m is hinged at its lower end while it was held at rest in a vertical position. What is the angular acceleration of the rod during the fall for a given theta
How far from the firing point is the height of the projectile.
Assuming a fica tax rate of 8% on the first 106,800 in wages, and a federal income tax rate of 20% on all wages, illustrate what would be an employee's net pay for the year if he earned 108,000?
A particular wire has a diameter of 1.7 mm and length of 1.3 m. If its resistance is 15 m?, what is the resistivity of the metal from which it is made
question1you encounters a moving walkway that is 91 long and has the speed of 2.1 relative to the ground. how long
A Carnot engine takes in heat from a reservoir at 470°C and releases heat to the lower-temperature reservoir at 200°C. What is its efficiency.
What is the speed of the center of mass
Four vectors A,B,C ,D and are shown (not to scale). Vector A has magnitude 23.0 and acts at an angle of 14.7 degrees with respect to the positive x axis. find the magnitude and direction of the resultant vector R
What is the capacitance after the separation becomes 2d.
An object is located on the inner side of a spinning cylinder with an angular velocity of 20rad/s. what is the radius of the cylinder
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