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A high-voltage copper transmission line with a diameter of 1.40 cm and a length of 300 km carries a steady current of 9.75 102 A. If copper has a free charge density of 8.46 x 1028 electrons/m3, over what time interval does one electron travel the full length of the line? answer in years?
Transverse waves with a speed of 59.0 m/s are to be produced on a stretched string. A 4.95-m length of string with a total mass of 0.0600 kg is used. Calculate the wave speed in the string
A spaceship travels at constant velocity from Earth to a point 780 ly away as measured in Earth's rest frame, How old is the passenger when the ship reaches its destination, as measured by the ship's clock
The fastest possible rate of rotation of a planet is that for which the gravitational force on material at the equator barely provides the centripetal force needed for the rotation. evaluate the shortest period of rotation
Assume unpolarized light of intensity 197 W/m2 falls on the polarizer in the figure, and the angle in the drawing is 37.0°. What is the light intensity reaching the photocell?
A bike rider approaches a hill at aspeed of 8.5 m/s. The combined mass of the bike and the rider is85.0Kg. choose a suitable system. find the initial kinetic energyof the system. the rider coasts up the hill. assuming there is nofriction, at what ..
A uniform metal rod, with a mass of2.9kg and a length of0.9m, is attached to a wall by a hinge at its base. Find the horizontal component of the force exerted on the rod by the hinge
A steel section of the Alaskan pipeline had a length of 65 m and a temperature of 18 °C when it was installed. What is its change in length
A 305 turn solenoid has a radius of 7.00 cm and a length of 24.0 cm. Find the inductance of the solenoid
A 7.42-g bullet is moving horizontally with a velocity of +362 m/s, where the sign + indicates that it is moving to the right, find the velocity of the second block after the bullet imbeds itself
A child leaves her book bag on a slide. The bag, which is at the top of the slide, starts from rest and reaches the bottom in 1.40 s. What is the friction force acting on the bag
A billiard ball moving at 5.90 m/sstrikes a stationary ball of the same mass. After the collision,the first ball moves at 5.06 m/s, atan angle of 31.0° with respect tothe original line of motion.
question1in an assured region of space there is uniform electric field e and uniform magnetic field b both directed
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