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A generator is designed to produce a maximum emf of140 V while rotating with an angularspeed of 3600 rpm. Each coil of the generator has an area of0.051 m2. If the magneticfield used in the generator has a magnitude of 0.050 T, how many turns of wire are needed?
Two scales on a voltmeter measure voltages up to 21.0 and 30.7 V, respectively. Determine the coil resistance
A 3.5 m string is stretched between a pulley and a wave generator consisting of a plate oscillating up and down with small amplitude and frequency 150 Hz. What is the linear mass density of the string
In a period of 1.0 s, 5.01023 nitrogen molecules strike a wall of area8.0 cm2. find the pressure exerted on the wall
A point charge q1=+2.40?C is held stationary at the origin. A second point charge q2=-4.30? C moves from the point x= 0.150 m , y= 0m
Force F = (-5.0 N) i hat + (5.0 N) j hat acts on a particle with position vector r = (-3.0 m) j hat + (5.0 m) k hat. What is the angle between the directions of force and torque
A 3.70g bullet moving at 250m/s enters and stops in an initially stationary 3.50kg wooden block on a horizontal frictionless surface, How much work was done in stopping the bullet
An elevator (cabin mass 530 kg) is designed for a maximum load of 3100 kg, and to reach a velocity of 2.6 m/s in 3 s. what is the tension the elevator rope has to withstand
A sample containing beryllium (atomic mass 9 u), aluminum (27 u), and an unknown element is placed in a mass spectrometer. What is the mass of the unknown element
Two waves are generated on a string of length 3.0 m to produce a three-loop standing wave with an amplitude of 4.6 cm, What are the lowest frequency
If a reflected ray in the air at an angle of reflection of 60 degrees is totally polarized, what is the index of refraction of the reflecting material
A block of wood has a mass of 3.70 kg and a density of 632 kg/m3. What mass of lead is needed if the lead is on top of the wood
A can of sardines is made to move along an x axis fromx1 = 0.22 m tox2 = 1.22 m by a force given byF = iF0exp(-0.36x), How much work is done on the can by the force
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