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The windings of a motor have a resistance of 4.0 O. The counter emf of this motor when connected to a 120-V line and running at full speed is 104 V.
A) What is the start up current of this motor?
B) What is the current of this motor when running at full speed?
suppose you have just discovered a new x-shy-ray binary which contains a b2 main sequence star orbiting an unseen
what common temperature must the two pieces be heated.
A circular coil of wire 8.40cm in diameter has 16.0 turns and carries a current of 2.60A . The coil is in a region where the magnetic field is 0.580 T, What is this maximum torque in part (A)
A simple circuit is set up that only consists of a 12 V battery connected to a light bulb with a resistance of 4 Ohms
The cheetah can reach a top speed of 114 km/h (71 mi/h). While chasing its prey in a short sprint, find the cheetah's average acceleration during the short sprint
The eyepiece of a refracting astronomical telescope (see the figure) has a focal length of 8.75 c. What is the angular magnification of the telescope
How many oxygen molecules do you inhale if you are at sea level?
what is the potential difference between the plates. A particular freely falling object requires 1.85 s to travel the last 31.0 m before it hits the ground. From what height above the ground did it fall.
A conducting slab (think of a large flat sheet of metal) is large compared to the size of individual particles, What is the acceleration of these particles
The displacement of a wave traveling in the negative x-direction is y(t)=( 5.6cm )cos( 5.2 x + 73 t), find the wavelength, frequency, and speed of this wave
Suppose two alpha particles were held together so they were just touching. Estimate the electrostatic repulsive force each would exert on the other
Three dogs are pulling on a blanket in different directions. The English shepherd is pulling north with a force of 40 N. in what direction is the boxer pulling
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