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An electron is in a strong, static, homogenous magnetic field with magnitude B0 in the z direction. At time t=0, the spin of the electron is in the +z direction. At t=0 a weak, homogenous magnetic field with magnitude B1 (where B1 << B0) is turned on. At t=0 this field is pointing in the x direction, but it rotates counterclockwise in the x-z plane with angular frequency ω, so that at any later time t this field is at an angle ωt relative to the x-axis:
Calculate the probability that at a later time tf the electron spin has flipped to the -z direction. Do not assume anything about the particular value of ω.
What is the velocity of q_{2} when the balls are 0.450 m apart. what is the speed that the bar falls.
The battery charger for an MP3 player contains a step-down transformer with a turn ratio of 1:40, What voltage does the secondary coil of the transformer provide
a 5-kg block is sent sliding across a frictionless table at a speedof 0.75 ms. it strikes the free end of an ideal
A bicycle racer is going downhill at 15.0 when, to his horror, one of his 2.06 wheels comes off when he is 76.0 above the foot of the hill. How much total kinetic energy does the wheel have when it reaches the bottom of the hill
A certain type of laser emits light that has a frequency of 5.2 x 10^14 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 2.7 x 10-11 s. How many wavelengths are there in one pulse.
An electrically charged bullet of mass 0.010 kg leaves thebarrel of a gun traveling parallel to the ground and perpendicularto the Earth's magnetic field at 1.400e+3 m/s. Intheory, what charge could the bullet carry in order to remain at aconstant..
a jet engine is moving an airplane forward at a speed of 900 km/hr. If the thrust of the engine is 1x10^5 N what is the power developed by the engine
An electron is released from rest at the negative plate of a parallel plate capacitor. How fast is the electron moving just before it reaches the positive plate
A lens in Lick Observatory's 36-inch refracting telescope has a thickness of 1.96 inches at its center and an index of refraction n=1.52. What is the light speed in the lens
the temperature t in a metal ball is inversely proportional to the distance from the center of the ball which we take
Spiderman's webbing has a cross sectional area of A = 10^-6 m^2. The Young's modulus of the silk is Y = 200 x 10^10 Pa, and has a breaking strength of 1 x 10^9 Pa. How far will it have stretched before breaking
The wavelength of light from a monochromatic source is measured to be 6.80 X 10^-7 m. What color would you observe
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