When the frequency of the light is increased in a photoelectric effect experiment, the energy of the emitted electrons __________
Fill in the blank(s) with correct word
increases
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Why is January a cold month in the northern United States?
A) Earth is near its farthest point from the sun. B) There's more snow in January. C) The northern hemisphere is farther from the sun than the southern hemisphere. D) The northern hemisphere is tilted away from the sun.
A hydrogen atom is in its n = 2 excited state when its electron absorbs a photon of energy . What is the energy of the resulting free electron? The lowest level energy state of hydrogen is -13.6 eV. (h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A) 5.1 eV B) 6.6 eV C) 6.9 eV D) 7.7 eV
Under which of the following conditions would a car have a westward acceleration?
A) As a car travels eastward with its velocity is increasing. B) A a car travels eastward with its velocity is decreasing. C) As a car travels westward with its velocity is decreasing. D) As a car travels westward with its velocity is constant. E) As a car travels eastward with its velocity is constant.
Two identical objects, one light colored and the other dark colored, are at the same cool temperature. Then, you place them outside, on a warm day, in direct sunlight. Which object will warm up faster?
A. The dark one B. Both warm up at the same rate C. The light one D. As strange as it seems, neither object will ever warm up because energy conservation prevents the addition of energy