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1) A 0.84 kg copper rod rests on two horizontal rails 0.56 m apart and carries a current of 65 A from one rail to the other. The coefficient of static friction between rod and rails is 0.49. What is the magnitude of the smallest magnetic field that puts the rod on the verge of sliding?What is its angle (relative to the vertical)?
2) A long, rigid conductor, lying along an x axis, carries a current of 7.0 A in the negative x direction. A magnetic field B is present, given by B= 4.0i + 6.0x2 j, with x in meters andB in milliteslas. Calculate the k-component of the force on the 2 m segment of the conductor that lies between x = 1.0 m and x = 3.0 m.
3) 30-turn coil of wire of dimensions 8 cm by 5 cm. It carries a current of 0.140 A and is hinged along one long side. It is mounted in the xy plane, at an angle of 30° to the direction of a uniform magnetic field of magnitude 0.80 T. What is the torque acting on the coil about the hinge line.
A small object is placed to the left of a convex lens and on it's optical axis. The object is 30 cm from the lens and has a focal length of 12 cm. Describe the nature of this image
question1an average human body might be considered to have a black surface of area 10m2 and surface temperature is
Water flows over a waterfall 10 meters to a turbine. Water flows at a rate of 10kg/sec. How much power is delivered to the turbine
After the Sun exhausts its nuclear fuel, its ultimate fate will be to collapse to a white dwarf state. Calculate the average density of the white dwarf
In attempting to pass the puck to a teammate, a hockey player gives it an initial speed of 3.0 m/s, what minimum initial speed did the player need to give the puck in order for it to reach the teammate
q1. an automobile with a mass of 1340 kg has 3.00 m between the front and rear axles. its center of gravity is located
An isolated hollow spherical conducting shell has a charge of 10^-6 C. In some manner, a point charge of 3*10^-6 C is placed inside the cavity of the shell,find the charge on the inner surface of the shell
A small spinning asteroid is in a circular orbit around a star, much like the earth's motion around our sun. calculate the equilibrium temperature of the asteroid
question a spacecraft approaching the earth launches an exploration vehicle. after the launch an observer on earth sees
A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for40.0 min at 50.0 km/h, 7.0 min at70.0 km/h and 35.0 min at 30.0km/h, and spends 35.0 min eating lunchand buying gas.
An electric fan is turned off, and its angular velocity decreases uniformly from 490rev/min to 210rev/min in a time interval of length 4.45s. Find the number of revolutions made by the fan blades during the time that they are slowing down in Part A
A pogo and rider of 80kg total mass at the high point of a 2.0m jump will drop 1.3m before the pogo plunger touches the ground, What approximate average force does the pogo stick exert on the ground during the landing
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