Which of the following regions was the result of plumes of hot mantle rising in a hot spot within a plate?
A) Alaska's Aleutian Islands
B) Japan and the Philippines
C) the islands of Hawaii
D) the volcano Mount St. Helens
E) all of the above
C
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Where does nuclear fusion occur in the Sun?
A) on the surface B) anywhere below the surface C) in its core D) just above the visible surface E) all of the above
When a metal surface is illuminated with light of wavelength 437 nm,
the stopping potential for photoelectrons is 1.67 V. (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, e = - 1.60 × 10-19 C, 1 eV = 1.60 × 10-19 J, mel = 9.11 × 10-31 kg) (a) What is the work function of the metal, in eV? (b) What is the maximum speed of the ejected electrons?
The observed acceleration of the expansion of the Universe is evidence that some form of energy, either a cosmological constant or quintessence, is spread throughout space
Indicate whether the statement is true or false
According to the figure, how do the positions of sunspots appear to change during one sunspot cycle? Do they get closer to or farther from the equator with time?
What will be an ideal response?