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In a 261-turn automobile alternator, the magnetic flux in each turn is ?B = (2.62E-4 T*m2) cos(?t), where ? is the angular speed of the alternator. The alternator is geared to rotate three times for each engine revolution. When the engine is running at an angular speed of 1020 rev/min determine the maximum emf in the alternator.
A battery with an emf of 12.0 V shows a terminal voltage of 11.0V when operating in a circuit with two lightbulbs rated, What is the battery's internal resistance
A sample of ideal gas occupies a volume of one litre at atmospheric pressure and temperature, 20 C. What pressure is required to squeeze the gas into one-half litre at 40 C?
The electric field inside a 50.0?cm? long copper wire is 5.00mV/m .What is the potential difference between the ends of the wire
The power is off for 34.0 s and throughout this time the flywheel slows as a result of friction in its axle bearings. Throughout the time the power is off, the flywheel makes 180 complete revolutions.
A 10.0-kg object experiences a drag force due to air resistance. At what velocity (magnitude and direction) is the net force on the object twice its weight
A baloon 1.2 g when empty has volume 800 cm ^3 and is filled with helium. density of air is 1.29 kg/m^3 while that of helium is .179 kg/m, calculate acceleration of balloon
A plane flies from base camp to Lake A, 340 km away in the direction 20.0° north of east. After dropping off supplies it flies to Lake B, which is 240 km at 30.0° west of north from Lake A. Graphically find the distance and direction from Lake B to..
A steel bridge is built in the summer when its temperature is 35.5oC. What is the length of the bridge on a cold winter day when its temperature is -11.5 oC
The solution to Bernoulli's equation, The construction of a flat rectangular roof (3.9 m x 4.3 m) allows it to withstand a maximum net outward force of 20050 N.
A pyramid has a square base and four faces which are equilateral triangles. A charge Q is placed on the center of the base of the pyramid, What is the net flux of electric field
approximately what is the mass of an object whose weight equals the force from part "b"? can you lift such a mass.
A capacitor is charged to a potential of 12.0 V and is then connected to a voltmeter having an internal resistance of 3.10M, What is the time constant of the circuit
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