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A high-voltage transmission line with a resistance of 0.255 ?/km carries a current of 1.25 kA. The line is at a potential of 650 kV at the power station and carries the current to a city located 129 km from the power station.
A. What is the power loss due to resistance in the line?
B. What fraction of the transmitted power does this loss represent?
A 40-kg pole vaulter running at 14 m/s vaults over the bar. Her speed while she is above the bar is 1m/s. Avoid air resistance, in addition to any energy absorbed by the pole, and determine her altitude as she crosses the bar.
A car rounds a banked curve. The radius of curvature of the road is R .the banking angle is a. the coefficient static friction is f.
Two steel juggling balls each carry a charge of2.75 μC. There is a repulsive force between themof 1.85 N. What is the distance between the centers of the two balls?
Calculate the pressure variation corresponding to a sound insensity of 10-16 W/cm2
q1. three capacitors are arranged as shown. c1 has the capacitance of 9 pf c2 has a capacitance of 18 pf and c3 has a
The radius of the inner pipe is 1.00m and it has a charge per unit length lamba=2.00 microC/m. The outer pipe has a radius of 2.00m and a charge per unit length of lamba=-1microC/m.
The International Space Station is orbiting at an altitude of about 370 km above the earth's surface. what is the period of the International Space Station's orbit
a?1000 kg aircraft going?25 ms collides with a?1500 kg aircraft that is parked. they stick together after the collision
A flat horizontal surface with an area of 505 cm2 is inside a uniform electric field of 1.40×104 N/C. What is the electric flux through the surface
A car with a mass of 1000 kg is on a country road which has its ups and downs or maxima and minima in height. what force does the ground exert on the car
Suppose that a particle accelerator is used to move two beams of particles in opposite directions. In a particular region, electrons move to the right at 9350 m/s and protons move to the left at 1681 m/s. The particles are evenly spaced with 0.085..
Batman (mass = 102 kg) jumps straight down from a bridge into a boat (mass = 550 kg) in which a criminal is fleeing. What is the velocity of the boat after Batman lands in it
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