Compared to the photon that enters a pane of window glass, the photon that emerges is
A) the same photon.
B) an identical but different photon.
C) an altogether different photon.
D) none of the above
Answer: B
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A solenoid of length 0.700 m having a circular cross-section of radius 5.00 cm stores 6.00 µJ of energy when a 0.400-A current runs through it. What is the winding density of the solenoid?
A) 865 turns/m B) 472 turns/m C) 1080 turns/m D) 104 turns/m E) 327 turns/m
An 80-eV electron impinges upon a potential barrier 100 eV high and 0.20 nm thick
What is the probability the electron will tunnel through the barrier? (1 eV = 1.60 × 10-19 J, mproton = 1.67 × 10-27 kg, h = 1.055 × 10-34 J ? s, h = 6.626 × 10-34 J ? s) A) 0.011% B) 1.1% C) 0.11% D) 1.1 × 10-4 % E) 7.7 × 10-10 %
For a specific element, photons of how many different energies could be emitted by electrons in the n = 6 level as they return to the n = 1 level?
a. 15 b. 21 c. 6 d. 1
Where do the ocean's salts originate?
What will be an ideal response?