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A circular loop in the plane of the paper lies in a 0.7 T magnetic field pointing into the paper. The resistance of the coil is 3 Ω. If the loop's diameter changes from 25 cm to 9 cm in 0.7 second, find what is the average induced current? In milli-amps?
mA
Calculate the activity of Uranium-238 in 100 grams of uranium ore containing 5 weight percent U308. What is the expected activity of Uranium-234 in the ore
A 4-kg block lies on a horizontal table whose coefficient of friction is 0.3. A horizontal rope is redirected by a uniform solid disk (pulley) of mass 2 kg to a mass of 12-kg hanging off the table. What is the angular acceleration of the disk
An artificial satellite circling the Earth completes each orbit in115minutes. (The radius of the Earth is6.38106m. What is the value ofgat the location of this satellite
While a person is walking, his arms swing through approximately a 45.0^\circ angle in 0.520s. What is the acceleration of a 1.60 gram drop of blood in the fingertips at the bottom of the swing
A nonzero net force acts on a particle and does work. Which one ofthe following statements is true? The kinetic energy of the particle changes, but the velocity of theparticle does not change. The kinetic energy, speed, and velocity of the particlech..
A prism is made of glass of unknown RI. A parallel beam of light is incident on a face of the prism. The angle of min deviation is measured to be 40 degree. What is the Refractive Index of the prism
A blue car with mass mc = 459.0 kg is moving east with a speed of vc = 19.0 m/s and collides with a purple truck with mass mt = 1245.0 kg that is moving south with a speed of vt = 10.0 m/s. obtain the magnitude of the initial momentum of the truck
a copper rod of length 1.12 m is lying on a frictionless table see the drawing. each end of the rod is attached to a
The amplitude of a lightly damped oscillator decreases by 2.8% during each cycle. What percentage of the mechanical energy of the oscillator is lost in each cycle?
A 1.81 kg block and a 3.62 kg block are initially at rest on a frictionless, horizontal surface, How much does the kinetic energy of the system increase
A solenoid of length 5.4 cm and diameter 0.92 cm is wound with 167 turns per cm, What is the induced emf in the entire solenoid
A piece of Nichrome wire has a radius of 7.2 x 10-4 m. It is used in a laboratory to make a heater that dissipates 3.30×102 W of power, estimate the necessary length of wire
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