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A wire carries an unknown current along the x axis. At a distance of 7cm from the wire the magnetic field has a strength of 10.0mT. What is the current in the wire?
compute the force exerted by the man, the work done by the man on the piano, the work done by the friction force, the work done by the force of gravity, and the net work done on the piano.
A 100 kg sphere and a 100 g sphere outside it are held fixed with the distance between their centers equal to 0.5 m, What are the magnitude and direction of the force on each of the spheres
Two students, Allison and Nora, are both the equal age when Allison hops aboard a flying saucer and blasts off to achieve a cruising speed of 0.830c for 25.5 years round trip, compute the difference in age between Nora and Allison
A 4.5 kg mass is fastened to a light spring, with the intervening cord passing over a pulley, find the change in gravitational potential energy of the of the mass
A rocket is fired straight up through the atmosphere from the South Pole, burning out at an altitude of 250 kilometer when traveling at 6.0km/s. Calculate maximum distance from Earth surface does it travel
A skier is gliding along at 5.0 on horizontal, frictionless snow. He suddenly starts down a 10incline. His speed at the bottom is 15. how long does it take him to reach the bottom
A mass of 1.0 kg is dropped from a height of 8.0 m above the top of a spring of constant k=200 N/m mounted vertically on the floor. Find the springs maximum compression
What is the magnitude of the force per meter of length on a straight wire carrying an 6.20 current when perpendicular to a 0.60 uniform magnetic field?
A probe sent to the surface of Mars uncovers a pure platinum disc inscribed with the message, "We'll be right back" (in Martian, of course!). The disc is 2 inches thick and 0.4 meters in diameter. The density of platinum is 21,450 kg/m3. What is the ..
Laser beam with wavelength 632.8 nm is aimed perpendicularly at opaque screen with two identical slits on it, What are the double slit characteristics (slit width, slit separation)
The engine in an imaginary sports car can provide constant power to the wheels over a range of speeds from 0 to 70 miles per hour (mph). At full power, the car can accelerate from zero to 30.0 in time 1.30 . At full power, how long would it take for ..
If a rocket's exhaust speed is 160 m/s relative to the rocket, what fraction of its initial mass must be ejected to increase the rocket's speed by 50 m/s
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