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A circular loop of wire is in the plane of the paper. The south pole of a bar magnet is being moved from a position in front of the paper in a direction away from the center of the loop. Which is the direction of the induced current in the loop?
A skier has a speed of 5.0 m/s on top of a hill that is 30.0 m above the valley floor. Determine the speed of the skier while she is in the valley floor
Estimate the percent change in mass δm/m of a block of copper which is heated from 300 K to 400 K. The molar speci?c heat of copper is cP = 2.6·104 J/kmol·K and, its atomic weight is 29.
A 110 granite cube slides down a 45 degree frictionless ramp. At the bottom, just as it exits onto a horizontal table, it collides with a 235 steel cube at rest. How high above the table should the granite cube be released to give the steel cube a..
A very long, straight solenoid with a cross-sectional area of 6.00cm squared is wound with 40 turns of wire per centimeter, What is the average induced emf in the secondary coil
question1an object of mass 1.2 kg is released from rest at the top of a 5 metre plank inclined at 40 degrees to
An energy storage system based on a flywheel (a rotating disk) can store a maximum of 4.2 MJ when the flywheel is rotating at 17,500revolutions per minute
The plates of a 7.4-µF capacitor have net charges of +0.83 µC and -0.83 µC respectively. Which plate is at the higher potential
A rod of 2.0-m length and a square (2.0 mm ? 2.0 mm) cross section is made of a material with a resistivity of 6.0 ? 10-8 ? ? m. at what rate is heat generated in the rod
A 29.0 kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 85.0 N and is directed at the angle of 30.0° above the horizontal. Find out the coefficient of kinetic friction.
Two sources emit waves that are in phase with each other. What is the largest wavelength that will give constructive interference at an observation point 161 m from one source
A projectile projectile is fired at an upward angle of 45o from the top of a 265-m cliff with a speed of 185 m/s. What will be its speed when it strikes the ground below
It is desired to project an image of an object four times actual size with a lens of focal length 20 cm. What object distance should be used
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