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Consider an infinite solenoid of radius R, n turns per unit length, and current I. Two cylinders of length L are coaxial with the solenoid : one of radius aR. If we gradually turn off the current the cylinders start to turn.
a/ Calculate the initial cinetic moment of the system stored in the electromagnetic fields.
b/ Calculate the final cinetic moment of each of the cylinders.
Struck from behind, a 950-kg stopped car accelerates from rest to 40km/h in 75 ms, What horizontal force on the head would accelerate it along with the rest of the body
An iron bar 40 cm long is braised to a copper bar 50 cm long and of the same diameter. determine the temperature of the junction point
Supporting his theory, since 2001, workers in the United States have enhancement their hours worked while tax rates have dropped. What theory or theories of motivation might describe such a change.
It's found that string is set into oscillation only at the frequency 880 Hz and 1320 Hz as the frequency of an oscillator is varied over the range 500-1500 Hz. What is the tension in the string.
Object A with mass 9*mo is moving in positive x direction at speed of 0.8c. Object B with mass 1.2*mo is moving toward negative x direction with speed of 0.6c, Find the kinetic energy of the system before and after the collision
Two cars, A and B, travel in the same direction on a straight section of highway. A has a speed of 72.0 km/h, What is the speed of B relative to A
A man is to pull a 50 .0 kg crate across a level terrain with a force of 50.0 N. What is the coefficient of kinetic friction, if the work done by friction is - 4.30 x 102 J
On a clear day the electric field in the atmosphere near the earth's surface is 100 N/C, directed vertically downward. What is the potential at the top of Pike's Peak, 14,110 ft above sea level
A small ball of mass 62 g is suspended from a string of length 37 cm and whirled in a circle lying in the horizontal plane. If the string makes an angle of 33? with the perpendicular, find the centripetal force experienced by the ball. The accelerati..
Assume someone drops an apple from a vertical distance of 6.0 meters, directly above the point where the arrow hits the tree.
A 124-? resistor and a 163-? resistor are both connected in parallel across a power supply, what is the exact potential drop (in V) across the 163-? resistor
A 2,200-kg car moving east at 10.0 m/s collides with a 3,000-kg car moving north. The cars stick together and move as a unit after the collision, Find the speed of the 3,000-kg car before the collision
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