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1. The magnetic field in a superconducting solenoid is 3T. How much energy there is in the solenoid, in J/m3 ?
2. A 10-mH inductor is connected in series with a 10 ohm resistor. What is the time constant of the circuit?
State your answer in terms of and Use three significant figures in the numerical coefficient.
Linear polarizers whose transmission axes make an angle of 45degree with each other The transmitted light intensity through both polarizers is what percentage of the incident intensity?
A 0.30 kilogram toy is attached to the end of a horizontal string and rotated in a circle of radius 1.3 meter on a frictionless horizontal surface. calculate the maximum speed the toy can have
A train engine weighs 5 times as much as aflatbed car. If the engine coasts at 3 km/hr into the boxcarthat is initially at rest and becomes coupled to the boxcar, how fast do the two move after the inelastic collision?
The near point of a naked eye is 25 cm. When placed at the near point and viewed by the naked eye, a tiny object would have an angular size of 5.2 10-5 rad. Find the focal length of the eyepiece in cm
A runner is running the first heat of a100 m race at a velocity of 6.9 m/s in an easterly direction. What is the relative velocity of the runner to the wind
Two ice-skaters, whose masses are 45 kg and 75 kg, holdhands and rotate about a vertical axis that passes between them,making one revolution in 2 s. Find the angular momentum of the system about their center of mass
a spherical body of mass m and charge q moves through a viscous medium at a constant speed a q ex under the influence
You are driving just behind a second car and both of you are moving at a speed 58mi/h. What is the minimum safe distance
To help keep her barn warm on cold days, a farmer stores 865kg of warm water. How many hours would a 2.00-kilowatt electric heater have to operate to provide the same amount of heat as is given off by the water as it cools from 20.0 degrees celcius t..
An unstable high-energy particle is created in the laboratory, and it moves at a speed of 0.988c. What is the proper distance traveled
A can of sardines is made to move along an x axis from x1 = 0.2 m to x2 = 1.2 m by a force given by F = iF0exp(-0.5x), How much work is done on the can by the force
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