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A tiny piece of metal contains 100 magnetic spins. At room temperature, there is an equal likelihood for an individual spin to be "up" versus "down." For the metal to be fully magnetized, all the spins must point in the same direction. What is the probability of finding the metal fully magnetized (either "up" or "down")?
A student is reading a lecture written on a blackboard. The lenses in her eyes have a refractive power of 54.56 diopters, How far is the blackboard from her eyes
A cylindrical container filled with water having a cross section 0.04 m^2 is placed on a scale, What is the rise in water surface after the ball is put in the water compared to before
find the coefficient of kinetic friction between skis and snow.Three equal point charges, each with charge 1.80 mu C, are placed at the vertices of an equilateral triangle whose sides are of length 0.500 m. What is the electric potential energy U o..
An experiment you're designing needs a gas with ? = 1.42. You recall from your physics class that no individual gas has this value, What fraction of the molecules need to be monatomic
A possible means for making an airplane invisible to radar is to coat the plane with an antireflective polymer. how thick would you make the coating
A series RLC circuit has a peak current of 4A with a frequency of 32kHz, determine the average power of the circuit over one cycle
Two balls , one of gold with a mass of 100 kg and one of wood with a mass if 1 kg, are suspended 1 meter apart. find attractive force the wooden ball acting on the gold ball
A rock of mass m = 2 kg is tied to a string of length L = 1.9 m and is twirled in a vertical circle. The speed v of the rock is constant; that is, it is the same at the top and the bottom of circle.
question1a 68.0-kg person throws a 0.0490-kg snowball forward with a ground speed of 32.0 ms. a second person with a
The speed of light in a certain piece of clear plastic is 1.87 108 m/s. A ray of light strikes the plastic at an angle of 17°. At what angle is the ray refracted
The far point of a nearsighted person is 8.4 m from her eyes, and she wears contacts that enable her to see distant objects clearly. How high is the image formed by the contacts
Suppose a 61 kg boy and a 43 kg girl use a mass less rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.0 m/s2, find the magnitude of the acceleration of the boy toward the girl.
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