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An astronaut who is repairing the outside of her spaceship accidently pushes away a 90.5-cm-long steel rod, which flies off at 12.9 m/s, never to be seen again. As it happens, the rod is oriented perpendicularly to the magnetic field in that region of space and moves perpendicularly to its length. The magnetic field strength there is 8.73 mT. What is the magnitude of the EMF, in millivolts, induced between the ends of the rod?
A Carnot engine operates between temperatures of 747 and 324 K. Calculate what the efficiency would be if (a) the temperature of the hot reservoir were raised by 42.5 K or (b) if the temperature of the cold reservoir were lowered by 42.5 K. (Give ..
A small block with a mass of 0.170 kg is attached to a cord passing through the hole in a frictionless, horizontal surface .The block is initially revolving at a distance of 0.50 m from the hole with a speed of 0.80 m/s. The cord is then pulled from ..
On a frictionless surface, a 3-kilogram cart moves at a velocity of 2 meters per second west, What is this slower speed
In a ballistic pendulum experiment a 20 g bullet is shot into a 2.3 kg block of wood suspended by a cord of negligible mass. what is the approximate muzzle speed (in m/s) for the gun that fired the bullet
A spotlight is coated so that it won't transmit magenta light from its white-hot filament. What colour emerges from coated spotlight.
A convex lense of focal length 18 cm is used as a magnifying glass. at what distance from a tiny insect must you hold this lense to get a magnification of 3.
Is the momentum change identical? If not, the ball would have the larger momentum change throughout the collision with the wall?
A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle, What is the mass of the wheel
A metal rod with a diameter of 2.30 cm and length of 1.10 m has one end immersed in ice at 32oF and the other end in water at 212oF. what is the thermal conductivity of this metal
At a county fair, two children ram each other head-on while riding on the bumper cars. Jill and her car, traveling left at 3.20m/s, determine the speed of Jill and her car after the collision
An athlete at the gym holds a 2.5 kg steel ball in his hand. His arm is 70 cm long and has a mass of 4-kg. What is the magnitude of the torque about his muster if he holds his arm straight out to his side, parallel to the floor.
A pair of oppositely charged parallel plates are separated by a distance of 5 cm with a potential difference of 550 V between the plates. A proton is released from rest at the positive plate at the equal time that an electron is released from rest..
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