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A 1.0-kg copper rod rests on 2 horizontal rails 1.0 m apart and carries a current of 50 A from 1 rail to the other.the coefficient of static friction is 0.60.What is the smallest magnetic field (vertical) that would cause the bar to slide with acceleration 0.5 m/s^2 ?
A metal bar is used to conduct heat. When the temperature at one end is 100 C and at the other is 20 C, what will be the rate of heat transfer
A flat conductor of thickness 0.500 mm is placed in a magnetic field of 0.200 T perpendicular to the flat surface. what is the Hall voltage generated when 3.40 A flows along the conductor
In compressing the spring in a toy dart gun, 0.6 J of work is done. When the gun is fired, the spring gives its potential energy to a dart with a mass of 0.08 kg, What is the dart's speed
The speed of a certain electron is 350 km/sec. If the uncertainty in its momentum is 0.010%, what uncertainty in its location must be tolerated
7400 J of input heat to perform a certain amount of work. Engine 2 has an efficiency of 0.33, How much input heat does the second engine require
the potential energy of a +5x10-6C charge decrease from 0.17J when it is moved from point A to point B. What is the change in the electric potential between these two points
The power rating of a resistor is the maximum power it can safely dissipate without being damaged by overheating. what is the maximum current it can carry without damage
A 1200 kg car is pulling a 500 kg triler along level ground. Friction is negligible. What is the magnitude of the force exerted by the car on the trailer
In a game of pool, a cue ball with an initial velocity of 1.50 m/s directed to the right (along the +x-axis) collides with the five ball, Find the cue ball's final velocity
A particle known as a pion lives for a short time before breaking apart into other particles. According to this hypothetical person, how far does the laboratory move before the pion breaks apart
You are given a force versus distance graph and the initial velocity at the origin. How do you calculate velocity at any point in time on the graph
A person with a near-point distance of 29 cm is able to get a usable magnification of 12 with a particular magnifying glass. What is the friend's near-point distance
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