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An in?nitely long wire carries a current I along the x-axis, and is bent so as to have a semi-circular detour around the origin, with radius R. Determine B at the origin.
A current of 27.0 mA is maintained in a single circular loop of 1.30 meter circumference. A magnetic field of 0.900 T is directed parallel to the plane of the loop. Obtain the magnetic moment of the loop
A 5-kilogram block is suspended by a cord from the ceiling. The magnitude of the tension force exerted on the block by the cord is most nearly
The astronomical object 4U0142+61 has the distinction of creating the most powerful magnetic field ever observed. What force does this wire experience
Helium (He), a monatomic gas, fills a 0.012 m3 container. The pressure of the gas is 6.90x 10^5 Pa. How long would a 0.25 hp engine have to run (1 hp = 746 W) to produce an amount of energy equal to internal energy of this gas.
A large 2.00×104 aquarium is supported by four wood posts (Douglas fir) at the corners, By how much is each post compressed by the weight of the aquarium
A uniform 210N ladder rests against a perfectly smooth wall, making a 40.0 degrees angle with the wall. Find the normal forces that the wall exert on the ladder
A wire with a mass of 1.0 g/cm is placed on a horizontal surface with a coefficient of friction 0.20. The wire carries a current of 1.5 A toward the east, and moves horizontally to the north. What are the magnitude and the direction of the smalles..
The magnetic field associated with an electromagnetic wave has amplitude of 1.8 μT. What is the intensity of this wave? What is the radiation pressure associated with this wave?
Two oppositely charged identical insulating spheres, each 42.0cm in diameter and carrying a uniform charge of magnitude 190µC, are placed 1.00m apart center to center. If a voltmeter is connected between the nearest points (a and b), what will it rea..
Two parallel plates having charges of equal magnitude but opposite sign are separated by 10.0 cm. Each plate has a surface charge density of 48.0 nC/m2. Determine the potential difference between the plates
Explorer is caught in a whiteout (in which snowfall is so thick that the ground cannot be distinguished from the sky) as returning to base camp.
A Lens maker desires to make a lens of focal length 30 cm. in air. The equipment in the shop is set to make lens faces of 20 cm. What would the focal length of this lens be in water (n=4/3)? What index of refraction must the lens material have to pro..
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