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Power transmission lines often use a form of electric current called alternating current, but in many regions, such as the Province of Quebec, high-voltage direct-current lines are used instead. Direct current is the kind of electric current you are studying in this chapter. A certain direct-current power transmission line has a resistance of 0.255 ?/km. 812 kV of potential drives the current from the generating station to a city located 125 km from the plant. What is the power loss due to resistance in the line?
A converging lens witha focal length of 12.0cm forms a virtual image 8.50mm tall, 18.0cm to the right of the lens. Determine the size of the object
A stone with a mass of 0.700 is attached to one end of a string 0.8 long. The string will break if its tension exceeds 65.0 . The stone is whirled in a horizontal circle on a frictionless tabletop; the other end of the string remains fixed.
How long did it take for officer to catch up to the car.
A 3kg model rocket initially at rest experiences an average force of 3950N over a distance of 200 cm. How much has the rockets kinetic energy increased
A projectile is launched from the top of a cliff above level ground. At launch the projectile is 35 meters above the base of the cliff and has the velocity of 50 meters per second at an angle 37° with horizontal. Air resistance is negligible.
A particle moving along a 2-d x-y plane has its velocity described by the functions: Vx=2t^2, what is the acceleration of the particle
Find out the magnitude of the impulse imparted to golf ball?
A train moving with constant velocity travels 180 m north in 14 s and an undetermined distance to the west. How far west has the train traveled in this time
The rms value of the electric field in an electromagnetic wave is Erms = 480 V/m. Find the average energy density
Agent Arlene devised the following method of measuring the muzzle velocity of a rifle. She fires a bullet into a 4.600-kg wooden block resting on a smooth surface, What is the speed v of the bullet
A square loop of wire surrounds a solenoid. The side of the square is 0.1 m, while the radius of the solenoid is 0.025 m. What is the current flowing in the square loop
The main components of a thermal/steam power plant are: Pump, boiler, steam turbine, condenser and generator. which one operates at higher temperature and pressure
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