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Nichrome wire of cross-sectional radius 0.786 mm is to be used in winding a heating coil. If the coil must carry a current of 9.50 A when a voltage of 2.10 102 V is applied across its ends, find the following. (a) the required resistance of the coil ? (b) the length of wire you must use to wind the coil
While working in a research lab, you find that it takes 211 J of heat to increase the temperature of 1.53 kg of a material by 44 K
A 1,030-kg car is pulling a 285-kg trailer. Together, the car and trailer have an acceleration of 2.00 m/s2 in the positive x-direction. determine the force exerted by the trailer on the car
A flat, uniform, circular disk (R = 2.25 m, m = 84.0 kg) is initially at rest, but it is free to rotate in the horizontal plane about a vertical, frictionless axis through its center.
An airplane moves at 120 m/sec to the west with respect to the air. How fast does the airplane move
A 1.8 kg ball of putty moving to the right has a head-on inelastic collision with the .50 kg putty ball moving to the left. If the combined blob doesn't move just after the collision, what can you end about the relative speeds of the balls before the..
A 3.0 kg mass is attached to a vertical spring hanging from the ceiling. The spring and mass are stationary. The spring constant for the spring is 250 N/m. What is the gravitational potential energy of the system
A skier traveling 12.0m/s reaches the foot of a steady upward18.0 degree incline and glides 12.2m up along this slope beforecoming to rest. What was the average coefficient of friction
A point charge q = +4.3 µC is placed at each corner of an equilateral triangle with sides 0.21 m in length. What is the magnitude of the electric field at the midpoint
A 4-kg mass is connected by a light cord passing over a pulley to a 2-kg mass. The pulley rotates about a frictionless axle and has a mass of 3kg and radius .2-m. find the acceleartion of the two masses
A car (mass = 1100 kg)is traveling at 32 m/s when it collides head on with asport utility vehicle (mass =2500 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle ..
A jumbo jet has a mass of 2.3 × 105 kg and a total wing area of 950 m2, what is the difference in pressure between the upper and lower wing surface
A high fountain of water is located at the center of a circular pool, Not wishing to get his feet wet, a student walks around the pool How high is the fountain
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