Galileo proposed that the Sun is a rotating sphere after he ____
a. noted how the Sun rose in the east and set in the west
b. discovered the parallax of the Sun
c. timed a full rotation of the Sun's equator
d. observed sunspots move across the surface of the Sun
e. measured different spectral lines of emission on different days
d
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If the momentum of an electron is 1.95 × 10-27 kg ? m/s,
what is its de Broglie wavelength? (h = 6.626 × 10-34 J ? s) A) 340 nm B) 210 nm C) 170 nm D) 420 nm E) 520 nm
Galactic cannibalism is the capture of the stars in a smaller galaxy by a larger galaxy during collision between the two.
Answer the following statement true (T) or false (F)
The slope of a distance vs. time graph is the __________
Fill in the blank(s) with correct word
When rubbing two insulators together, the one that gets a positive charge has had
A. protons added. B. protons removed. C. electrons added. D. electrons removed. E. electrons added and protons removed.