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A steady current, I flows through a wire of radius R. Find the magnetic field inside and outside the wire if a uniform current density, K=Ko(z-hat) flows on the surface of the wire, s = R , like in a superconductor.
an electric dipole has charges of +- 4.55pC that are seperate by 6.00cm. The dipole lies on the x axis and its center is at the origin. Determine the torque on the dipole about its center of mass
You sled down a hill of 45-m vertical height. The combined mass of you and your sled is 130kg. How much work was doen against friction during your decent
Regarding the Earth and a cloud layer 750m above the Earth as the "plates" of a capacitor, calculate the capacitance. Suppose cloud layer has an area of 1 km2 and that the air between cloud and ground is pure and dry.
According to the definition of work, the work done by an external force in moving a heavy crate along a horizontal surface should be the same whether the force is pulling upward at a 45 degree angle or pushing downward at a 45 degree angle. In practi..
An astronaut weighs 152 N on the surface of the moon. If the same astronaut orbits the moon at an altitude equal to the moons radius, what gravitational force does the moon exert on him at this altitude?
A car initially traveling at 23.2 m/s undergoes a constant negative acceleration of magnitude 2.10 m/s2 after its brakes are applied. (a) How many revolutions does each tire make before the car comes to a stop, assuming the car does not skid and the ..
Perform the following unit conversions for parts (A) in the table below (B) through. Show your work using a step-wise approach.
You find an unlabeled box of fine needles, and want to determine how thick they are. What is the diameter of the needle
An object falls off of a pier into the ocean (salt water) where it displaces a total volume of 2.2 cubic meters of sea water
An object acted on by three forces moves with constant velocity. One force acting on the object is in the positive x direction, Find the direction of the third force acting on the object
Consider the collision between two hockey pucks in the figure below. They do not stick together. Their speeds before the collision are v1i = 27 m/s and v2i = 14 m/s. What is the final velocity of the other puck
A circus performer stretches a tightrope between two towers. He strikes one end of the rope and sends a wave along it toward the other tower. find the tension in the tightrope
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