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If a visible photon by wavelength 434 nm is emitted from an atom in a hydrogen gas lamp, what energy state was the atom in before the photon was emitted? That is, what was the number for that state?
An X-ray photon with a wavelength of 0.260 nm scatters from a free electron at rest. Find the final momentum of the photon
An explosion occurs at the end of a pier. The sound reaches the other end of the pier by traveling through three media: air, fresh water, how much later do the second and third sounds arrive
Copper wire (resistivity 1.7x10-8 italic capital omega space straight m , circular cross section with radius 2.34 mm) is used to form 2 thousand circular loops of wire in a solenoid
Calculate the peak voltage of a generator that rotates its 210 turn, 0.100 m diameter coil at 3600 rpm in a 0.830 T field
A 41.2-kg boy, riding a 2.65-kg skateboard at a velocity of +5.07 m/s across alevel sidewalk, jumps forward to leap over a wall. Just afterleaving contact with the board, the boy's velocity relative to the side walk is 6.60 m/s, 9.63° above the ho..
A current of 74.8 mA exists in a metal wire, In what direction do the electrons travel with respect to the current
A 10.0g plastic ball is dropped from a height of 3.30m and is moving at 3.00m/s, How much mechanical energy was lost during the balls fall
q1. a violin string that is 45.5 cm long has a fundamental frequency of 490 hz.what is the speed of the waves on this
a new record for running the stairs of the empire state building was set on february 3 2003. the 86 flights with a
Explain the concepts behind the gravitational constant, gc. Define the constant mathematically.
An electrical heating coil is immersed in 4.0kg of water at 21 degrees C. What is the potential difference at which the coil operates
A 50 kg person climbing a rope slides down after reaching the top. find The frictional force acting upward on the person
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