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A conducting rod slides down between two frictionless vertical copper tracks at a constant speed of 5.3 m/s perpendicular to a 0.62-T magnetic field. The resistance of the rod and tracks is negligible. The rod maintains electrical contact with the tracks at all times and has a length of 1.7 m. A 0.64- resistor is attached between the tops of the tracks.
(a) What is the mass of the rod?
(b) Find the change in the gravitational potential energy that occurs in a time of 0.21 s.
(c) Find the electrical energy dissipated in the resistor in 0.21 s.
The graph of two cars that collide shows that they intersect at a point 5.5m on a distance/time graph. The first car has a velocity of 0.39m/s. what does the steepness of the slope indicate
A ball of mass 4.9 g with a speed of 22.5 m/s strikes a wall at an angle 29.0o and then rebounds with the same speed and angle. compute the average force exerted by the ball on the wall
A man tries to determine the distance to an island offshore by using his knowledge of physics and wave motion. how far away is the island
A simple and common technique for accelerating electrons is shown in the figure, where there is a uniform electric field between two plates. Calculate the horizontal component of the acceleration
Illustrate what are the velocities of the two people after the snowball is exchanged? Disregard the friction between the skates and the ice.
The plates of a parallel-plate capacitor each have an area of 0.1 m2 and are separated by a 1 mm thick layer of paper. Find the electric field between the plates
You take the elevator to the roof of midtown skyscraper that is 100 meters high. What was the velocity of your souvenir just before it hit the ground
A box slides across a frictionless floor with an initial speed v = 4.9 m/s. It encounters a rough region where the coefficient of friction is uk = 0.3. What is the shortest length of rough floor which will stop the box
A speedboat starts from rest and accelerates at +2.01 m/s2 for 6.80 s. At the end of this time, Find the total displacement of the boat
A uniformly accelerated car passes three equally spaced traffic signs. The signs are separated by a distance d = 25 m. The car passes the first sign at t = 1.3 s, What is the magnitude of the acceleration of the car
A 50 kg person stands at the edge of a 7.4 m diameter circular platform, which is mounted horizontally on frictionless bearings and has a total mass of 300 kg. What is the magnitude of the speed of the person (in m/s) with respect to the ground
Consider resistors R1 and R2 connected in series E R1 R2 and in parallel E R1 R2 to a source of emf E that has no internal resistance. How does the power dissipated by the resistors
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