According to the nebular theory of solar system formation, which law best explains why the central regions of the solar nebula got hotter as the nebula shrank in size?
A) the law of conservation of energy
B) the law of conservation of angular momentum
C) Newton's third law
D) the two laws of thermal radiation
A) the law of conservation of energy
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Flux is a measure of the light energy from a star that hits a collecting area of one square meter in one second
a. True b. False Indicate whether the statement is true or false
A conductor differs from an insulator in that a conductor has more
A) electrons than protons. B) protons than electrons. C) energy than an insulator. D) faster moving molecules. E) none of the above
A sound wave coming from a tuba has a wavelength of 0.674 m and travels to your ears at a speed of 345 m/s. What is the frequency of the sound you hear?
a. 512 Hz c. 230 Hz b. 1/517 Hz d. 1/230 Hz
The photons of blue light have:
A) more energy than the photons of red light. B) more energy than the photons of ultraviolet light. C) a lower frequency than the photons of red light. D) a longer wavelength than the photons of red light.