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Two long straight wires are parallel and 7.8 cm apart. Theyare to carry equal currents such that the magnetic field at a pointhalfway between them has magnitude 350 µT. How much current(in A) is needed?
A futuristic design for a car is to have a large disklike flywheel within the car storing kinetic energy. The flywheel has mass 370 kg with a radius of 0.50 m and can rotate
A 58.0 %u03BCF capacitor is connected to a generator operating at a low frequency. The rms voltage of the generator is 5.00 V and is constant. at what frequency will the fus
Sonar is used to determine the speed of an object. A 40-kHz signalis sent out, and a 42-kHz signal is returned. Assume the speed of sound is 345 m/s. How fast is the object
Two skaters, one with mass 69 kg and the other by mass 39 kg, stand on an ice rink holding a pole of length 12 m and negligible mass. Starting from the ends of the pole, the s
A spherical balloon has a radius of12.5m, and is filled with helium. How large a cargo can it lift, assuming that the skin and structure of the balloon have a mass of600kg
Monochromatic light has one wavelength. Fluorescent lights are a source of coherent light. Destructive interference occurs when two waves differ in phase by 180 degrees. A pha
For satellites to be in synchronous orbits with Earth, should their linear (tangential) velocities, or their angular velocities be equal to Earth's surface value? Provide an
Two rigid rods are oriented parallel to each other and to the ground. The rods carry the same current in the same direction. The length of each rod is 0.90m, and the mass of e
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