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A metal wire of mass m slides without friction on two horizontal rails spaced a distance d apart, as in the figure below. The track lies in a vertical uniform magnetic field vector B. Generator G produces a constant current i in the wire and the rails (even as the wire moves). Find the velocity of the wire's motion as a function of time, assuming it to be stationary at t = 0.
(Use any variable or symbol stated above along with the following as necessary: B for the magnitude of vector B. All quantities are in SI units. Enter the sign of the expression, taking right to be positive.)
A magnetic field is perpendicular to the plane of asingle-turn circular coil. The magnitude of the field is changing,so that an emf of 0.80V and a current of 3.2 A are induced in the coil.
Presume a ship cruises with a constant velocity when the thrust from its engines is a constant 10000N. What is the acceleration of the ship? What is the force of air resistance acting on the ship?
What is the average velocity (Vrms) of 0.75kg of air at room temperature (20°C), What is the average kinetic energy of air at 20°C, using the velocity you just calculated
Many people mistakenly believe that the astronauts orbiting the earth are "above gravity." Compute the acceleration because of gravity, g, for space shuttle territory, 245 kilometres above the earth's surface (dashed line in sketch). Earth's mass ..
An alpha particle, the nucleus of a helium atom, has a mass of 6.7*10-27 kg and a charge of 3.2*10-19C. It floats at rest above a charged horizontal sheet with uniform charge density on its surface.
a 5.45-kg ball hangs from the top of a vertical pole by a 2.19-m-long string. the ball is struck causing it to revolve
The left end of a long glass rod, 8.00 cm in diameter, has a convex hemispherical surface 4.00 cm in radius. Determine the position sb of the image of an object placed in air on the axis of the rod infinitely far from the left end of the rod
A swimming pool appears to be 1.98 m deep, when you view the bottom of the pool from directly above the water's surface. What is the actual depth?
A plane weighing 220kN (25 tons) lands on an aircraft carrier. The plane is moving horizontally at 67 m/s (150 mi/h) when its tail hook grabs hold of the arresting cables. The cables bring the plane to a stop in a distance of 84 m. How much work is..
A point charge q of mass m is held a distance from an infinite grounded conducting plane. There is no gravitation. When released, the charge starts to move toward the plane. What is the charge velocity when it hits the plane?
A rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 44.1m/s2. Find the maximum height y max reached by the rocket
A 2.20 kg frictionless block is attached to an ideal spring with forces constant 314N/m. At first the block has velocity -3.60 m/s and displacement 0.300-m.
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