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A vertical straight wire carrying an upward 40-A current exerts an attractive force per unit length of 8.8*10-4 N/m on a second parallel wire 5.0cm away. What current (direction and magnitude) flows in the second wire?
To stretch a certain spring by 2.20 from its equilibrium position requires 7.00 of work. What was the maximum force required to stretch it by that distance
A 10 ohm resistor and a 20 ohm resistor are connected in parallel. What is the equivalent resistance of this setup
A 217-kg log is pulled up a ramp by means of a rope that isparallel to the surface of the ramp. The ramp is inclined at30.0° with respect to the horizontal. The coefficient ofkinetic friction between the log and the ramp is 0.860, and the loghas a..
A spring oscillator is designed with a mass of 0.132 kg. It operates while immersed in a damping fluid, Find the required damping constant for the system
A light ray is propagating in a crystal where its wavelengthis 531 nm. It strikes theinterior surface of the crystal with an incidence angleof 30°, Find the light's frequency
A 72.0 kg base runner begins his slideinto second base when he is moving at a speed of 4 m/s. The coefficient of friction between hisclothes and Earth is 0.70. He slides so that his speed is zero justas he reaches the base.
Current density is a measure of the amount of current flowing through a volume. The conventional direction of current is the hypotheticaldirection of movement of positive charges through the wires of anelectric circuit. Through a certain cross-sectio..
A person is riding a bicycle, and its wheels have an angular velocity of 22.7 rad/s. What is the anguar acceleration (in rad/s2) of each wheel
the snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57. Find out the acceleration of the sled and child.
Two people carry a heavy electric motor by placing it on a light board 1.50{\rm m} long. One person lifts at one end with a force of 370{\rm N} , What is the weight of the motor
A magician pulls a tablecloth from under a 200 g mug located 30.0 cm from the edge of the cloth. The cloth exerts a friction force of 0.140 N on the mug, and the cloth is pulled with a constant acceleration of 2.90 m/s2. How far does the mug move rel..
A gold prospector finds a solid rock that is composed solely of quartz and gold. Find the mass of the gold in the rock
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