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A 676kW power station delivers power to a factory. The power is delivered through wires with a total (i.e. round-trip) resistance of 3.76Ohm. How much less power is wasted in the transmission wires if the electricity is delivered from the power station at 54200V rather than 13700V? (Hint: Consider the power plant as a battery delivering the voltage for the transmission line. How much current is flowing through the wire?)
Determine the magnetic force on an identical particle when it travels through the same magnetic field with a speed of 5.44 m/s at an angle of 32.2° relative to the magnetic field
The density of bcc iron is 7900 kg/m3 and its atomic weight is 56. Calculate the side of the cubic unit cell and the interatomic spacing
Block A of Figure has a velocity of 15 ft/sec down slope. How far will the block slide along the slope? How far will the block slide along the slope before stopping?
What is the speed of a wave on a string that has a mass of 9.6 kg and a length of 7.2 m while a 7.0 kg mass is hanging from the end?
What is the total magnitude of the magnetic flux by the coil before it is rotated.
A very large number (N+1) polaroids are arranged in a sandwich.
A concave shaving mirror has a focal length of 95 cm. find the image position of a cologne bottle placed in front of the mirror at a distance of 165cm. Calculate the magnification of the image. Is the image real or virtual? Is the image inverted o..
A platform moves up and down in SHM, with amplitude 0.050 m. Resting on top of the platform is a block of wood. What is the shortest period of motion for the platform so that the block will remain in constant contact with it?
A 1.00 kg glider on a horizontal air track is pulled by a string at an angle θ. The taut string runs over a pulley and is attached to a hanging object of mass 0.500 kg .
The bullet remains embedded in the block, which is observed to slide a distance 0.280 m along the surface before stopping. What was the initial speed of the bullet?
Calculate the orbital period of Neptune (in yr) from knowledge of G, the mass of the sun (M = 1.99×1030 kg), and the orbital radius of Neptune of 3.00×101A.U
Assume that the net horizontal force is due to rolling friction only and take free-fall acceleration to be = 9.80 .What is the coefficient of rolling friction for the tire under low pressure.
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