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Think about an infinite coaxial cable. In the region 0<r<a, the current density J=kr2 into the page. In the region a<r<b, the total current I = -I0. What is the magnetic field in all space, and what value must k have so that the field vanishes for r>b?
A hockey player is standing on his skates on the frozen pond when an opposing player, moving with a uniform speed of 13 m/s, skates by with the puck. After 2.5 s, the first player makes up his mind to chase his opponent.
The potential difference between the accelerating plates of a TV set is about 25 kV. If the distance between the plates is 1.5 cm, find the magnitude of the uniform electric field in the region between the plates.
A ceiling fan consists of a small cylindrical disk with 5 thin rods coming from the center. The disk has mass md = 3.3 kg and radius R = 0.22 m. The rods each have mass mr = 1.2 kg and length L = 0.76 m.3) What is the moment of inertia of the whole c..
A vacuum cleaner is plugged into a 120.0-V socket and uses 4.4 A ofcurrent in normal operation when the back emf generated by the electric motor is 77.8 V. Find the coil resistance of the motor.
When a block slides down an inclined plane with a constant velocity
A person bounces up and down on a trampoline, while always staying in contact with it. The motion is simple harmonic motion, What is the maximum speed attained by the person
YOu would like to shoot an orange out of a tree with your bow and arrow. The orange is hanging 5.00 m above the ground. What is the height of the arrow once it traveled the 55 m horizontally
A grating with 1300 slits percentimeter is illuminated with light of wavelength 500 nm. What is the highest order number that can be observed with this grating
At what angle must the projectile be fired to hit a target positoned at a range 10km away if the initial speed of the projectile is 500ms
Unpolarized light with an intensity of585W / m2 is incident on a polarizer with an unknown axis. The light then passes through a second polarizer with has an axis which makes an angle of67.0° with the vertical.
The plates of a parallel-plates capacitor each have an area of 4.0cm^2 and are seperated by 0.02mm. The plates are charged with 30 uC, How much electrical energy is stored in the capacitor
the equation of oscillation of a mass-spring system is xt 0.3cos4t - 0.7 where x is in meters and t in seconds. the
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