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High voltage power transmission lines are made out of aluminum with a crosssectional area of about 4.4 x 10-4m^2. These lines typically carry currents of 1.3-A.
The transmission current and the return current flow through high tension cables strung roughly 0.5-m apart. Prove that we should not notice the forces exerted on the wires by the Earth's magnetic field (average strength of 0.50 Gauss) on on each other.
Compare the forces per unit length with their weight per unit length.
A circular coil of 15 turns and area 4.0 cm^2 carries a current of 1.2 A. What is the resultant force acting on this coil
What is the potential difference measured by voltmeter
A magnifying glass uses a converging lens with a focal length of 15.5 cm. It produces a virtual and upright image that is 3.3 times larger than the object. How far is the object from the lens
A 62-kg astronaut is in space, far from any objects that would exert a significant gravitational force on him. How fast is the astronaut moving after he throws the mallet
A 1560kg car is travelling with a speed of 14.20 m/s. What is the magnitude of the horizontal net force that is required to bring car to a halt in a distance of 52.10 m.
You (mass 90 kg) are a spyentering a high-security building through a skylight 20 m above thef loor. Your partner is lowering you on a rope (total mass 10 kg,total length 25 m) and you need to tell her when to stop lowering you. You can’t shout up to..
question a circuit consists of a resistor in series with an inductor and an ac generator that supplies a voltage of 115
a wire carrying a current is placed in a uniform magnetic field. When a current of 3.7A flows in the wire there is a force of 0,075N on each 18cm of wire in the field
In a diesel engine, the piston compresses air at 301 K to a volume that is 0.0621 of the original volume, What is the temperature of the air after the compression
1.describe at least two possible challengesproblems that you may encounter when you are characterizing a watershed
An astronaut weighs 85 N on the Moon, where the acceleration of gravity is 1.62 m/s2. How much (in N) does she weigh on Earth
a woman of mass m stands at the edge of a solid cylindrical platform of mass m and radius r. at t 0 the platform is
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