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An aluminum wire consists of the three segments. Current throughout = 6A J1=1.9E6-------J2=7.6E6------J3=1.9E6 Find the drift velocity for each J.
On a cold day, 16000 J of heat leaks out of a house. The inside temperature is 20.0° C, What is the increase in the entropy of the universe
A rotating door is made from four rectangular sections, as indicated in the drawing. The mass of each section is 80kg. A person pushes on the outer edge of one section with a force of F = 72N that is directed perpendicular to the section. Find out..
The position of the front bumper of a test car under microprocessor control is given by x(t) = 2.07 m + (4.50 m/s2)t2 - (0.100 m/s6)t6. Find its position at the first and second instants when the car has zero velocity
Two unequal masses are hung from the ends of a rope that runs over a pulley. What is the acceleration of the smaller mass
A ball falls straight down onto a wedge that is sitting on frictionless ice. The ball has a mass of 3.11kg, and the wedge has a mass of 5.39 kg. The ball is moving the speed of v = 4.45m/s when it strikes the wedge, which is initially at rest.
A nuclear power plant has a reactor that produces heat at the rate of870MW. This heat is used to produce260MW of mechanical power to drive an electricalgenerator. What is the thermal efficiency of the plant
A girl delivering newspapers covers her route by traveling 9.00 blocks west, 4.00 blocks north, and then 2.00 blocks east, What is the total distance she travels
A spherical weather balloon is filled with hydrogen until its radius is 3.40 m. Its total mass including the instruments it carries is 10.0 kg. Find the buoyant force acting on the balloon
A 150 ohm resistor, a 30 mH inductor and a 2 uF capacitor are connected in series with a 120 V rms source at 1500 Hz. What is the impedance of this circuit
A 0.060 kg handball is thrown straight toward a wall with the speed of 14 m/s. It rebounds straight backward at a speed of 6.5 m/s. If the ball is in contact with wall for 3.0 ms, what average force is exerted on the wall by the ball.
If the string is 9.5 m long, has a mass of 45 g and is pulled taut with the tension of 8.0 N, how much time does it take for a wave to travel from one end of the string to the other.
An electric generator contains a coil of 90 turns of wire formed into a rectangular loop 40.0 cm by 35.0 cm, placed entirely in a uniform magnetic field with magnitude B = 3.50 T and with Bvec initially perpendicular to the coil's plane. What is the ..
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