When an electron drops to a lower energy level in an atom,
A) the electron becomes more massive.
B) the atom moves more slowly.
C) light at a wavelength specific to the change in energy levels is emitted.
D) the extra energy disappears.
C
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____ is absorbed by water in Earth's atmosphere and requires that telescopes for observing at these wavelengths be placed on mountain tops or in space
a. Infrared radiation b. Ultraviolet radiation c. Radio wave radiation d. X-ray radiation e. Visible light
A 30.0 cm wrench is used to generate a torque at a bolt. A force of 50.0 N is applied at the end of the wrench at an angle of 70.0 degrees. The torque generated at the bolt is
A. 10.4 N•m. B. 14.1 N•m. C. 19.7 N•m. D. 21.5 N•m. E. 26.2 N•m.
Which characterizes the magnetosphere/strength of magnetic fields on Jupiter?
A. the same as on Earth so that it has aurora B. completely absent C. weaker than that on Earth, but it still has aurora D. a thousand times that on Earth so that it cannot have aurora E. ten times stronger than Earth so that it has aurora
Which of the following can act like a long-term "thermostat" for the Earth's average temperature?
A) heat stored in the Earth's magnetosphere B) the carbon dioxide cycle C) radioactive elements trapped in the Earth's mantle D) heat stored in the Earth's liquid core