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A length of copper wire carries a current of 17 A, uniformly distributed during its cross section. The wire diameter is 2.5 mm, and its resistance per unit length is 4.0 /km.
a) Compute the energy density of the magnetic field at the surface of the wire.
b) Compute the energy density of the electric field at the surface of the wire.
A 4.4 kg box is lifted by a force equal to the weight of the box. The box moves upward at a constant velocity of 3 m/s. What is the power input of the force
For the real or imaginary nucleus of 85X210, find the net electrical charge of the nucleus, the approximate radius of the nucleus, and the nuclear density
Two blocks are stacked on a frictionless table. A horizontal force F is applied to M2. If M1=1.39kg, M2=3.02 Kg, and F=6.3 N, find the size of the contact force between the two blocks
A solid uniform 38.9kg ball of diameter 36.2cm is supported against a vertical frictionless wall using a thin 30.0cm wire of negligible mass. how hard does the ball push against the wall
Waves from a radio station have a wavelength of 300m. They travel by two paths to a home receiver 20.0km from thetransmitter. What is the minimum distance from the mountain to the receiver
Four objects are situated along the y axis as follows: a 2.13 kg object is at +3.28 m, a 3.34 kg object is at +2.40 m, Where is the center of gravity of this system
The capacitance of a plate capacitor is proportional to the dielectric constant. An electric field can induce dipoles in a material. Stored energy and voltage of a capacitor with a givencharge are proportional to each other. A dielectric material doe..
a 0.07 kg bullet traveling at 577 ms hits a 5.6 kg block of wood and stays in the wood. what is the velocity of the
Dolphins and other sea creatures can leap to great heights by swimming straight up and exiting the water at a high speed. How much time does it take for the dolphin to come to rest
In the figure below, two straight conducting rails form a right angle. A conducting bar in contact with the rails starts at the vertex at time t = 0 and moves by a constant velocity of 5.80 m/s along them. A magnetic field with B vec =0.350 T is dire..
A violin string 12.2 cm long and fixed at both ends oscillates in its n = 4 mode. The speed of waves on the string is 285 m/s, and the speed of sound in air is 348 m/s. What are (a) the frequency and (b) the wavelength of the emitted sound wave?
Define proton-proton chain efficiently
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