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bricefitzpatrick0429
14.07.2020 •
Physics
In an experiment different wavelengths of light, all able to eject photoelectrons, shine on a freshly prepared (oxide-free) zinc surface. Which statement is true
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Ответ:
the energy of the photons is greater than the work function of the zinc oxide.
h f> = Ф
Explanation:
In this experiment on the photoelectric effect, it is explained by the Einstein relation that considers the light beam formed by discrete energy packages.
K_max = h f - Ф
in the exercise phase, they indicate that different wavelengths can inject electrons, so the energy of the photons is greater than the work function of the zinc oxide.
h f > = Ф
Ответ:
You are given statistics: 12 girls and 16 boys. You solve for the total which is 12+16 = 28. This would be the denominator of your probability. For the numerator, we use the statistics for the girls. Therefore, the probability of selecting a girl to dive first is
Probability = 12/28 = 3/7 or 42.86%