Which of these did Rutherford's "solar system" model of the atom successfully explain?
a. Spectral lines.
b. The periodic properties of the elements.
c. How atoms could give off light without collapsing.
d. Why some alpha particles would bounce back when hitting an atom.
e. Absorption spectra.
d
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What inevitably forces a star like the Sun to evolve away from being a main sequence star?
A) The core begins fusing iron. B) The star uses up all its supply of hydrogen. C) The carbon detonation explodes it as a type I supernova. D) Helium builds up in the core, while the hydrogen burning shell expands. E) The core loses all its neutrinos, so all fusion ceases.
The tensile force divided by the original cross-sectional area of a specimen is the engineering normal _____________.
Fill in the blank(s) with the appropriate word(s).
Which of the following correctly lists the terrestrial worlds in order from the most atmospheric gas to the least? (Mercury and the Moon are listed together since their atmospheres have very similar amounts of gas.)
A) Venus, Earth, Mars, Mercury/Moon B) Earth, Venus, Mars, Mercury/Moon C) Mars, Venus, Earth, Mercury/Moon D) Venus, Mars, Mercury/Moon, Earth
The Greek astronomer who assigned the stars to six magnitudes was named _______________
a. Aristotle b. Socrates c. Hipparchus d. Panos