Like our solar system, the whole Milky Way is about five billion years old
Indicate whether the statement is true or false
FALSE
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The runoff channels on Mars were most likely formed by
A) melting underground ice. B) catastrophic, but rare flooding C) the annual melting of the polar ice caps. D) glaciers. E) rain that was part of a water cycle.
The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 × 1013 rad/s. The mass of a nickel atom is 9.75 × 10-26 kg
What is the difference in energy between adjacent vibrational energy levels of nickel? (h = 6.626 × 10-34 J ? s, h = 1.055 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J) A) 0.023 eV B) 0.019 eV C) 0.015 eV D) 0.031 eV E) 0.027 eV
The pressure in a constant-volume gas thermometer extrapolates to zero at what temperature?
a. 0°C c. 0°F b. 0 K d. 0 Pa
What is happening inside a star while it expands into a subgiant?
A) It is fusing hydrogen into helium in the core. B) It is fusing hydrogen into helium in a shell outside the core. C) It is fusing helium into carbon in the core. D) It is fusing helium into carbon in a shell outside the core. E) It is not fusing any element; it is contracting and heating up.