The pressure in the photosphere affects the width of spectral lines
Indicate whether the statement is true or false
TRUE
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Which of the following was an important source of prebiotic molecules (e.g., amino acids) on the early Earth?
A) molecules produced on the surface by impacts B) molecules produced by chemical reactions near deep-sea ocean vents C) molecules transported to the surface by impacts D) all of these
An ore car of mass 4 900 kg rolls downhill on tracks from a mine. At the end of the tracks, 13.5 m lower in elevation, is a spring with k = 410 000 N/m. How much is the spring compressed in stopping the ore car? Ignore friction
a. 1.26 m b. 0.889 m c. 1.78 m d. 0.568 m e. 0.484 m
The shell model is an example of a
A) physical model. B) conceptual model. C) both a physical and conceptual model. D) None of the above.
What effect does the size of the box have on the ground state energy of a particle trapped in that box?
A) If the box is smaller, the energy is greater. B) If the box is larger, the energy is greater. C) The size of the box has no influence on the energy. D) Not enough information is given to answer this question.