In electron diffraction, an electron moving at speed v << c acts like
a. a particle with momentum mv.
b. a particle with position coordinate v/t.
c. a wave with wavelength v/t.
d. a wave with wavelength h/mv.
e. both a particle with position coordinate v/t and a wave with wavelength v/t.
d
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Before about 4 billion years ago the universe was:
A) radiation dominated. B) quark dominated. C) lepton dominated. D) matter dominated. E) dark energy dominated.
A certain ideal gas has a molar specific heat at constant volume Cv = 7R/5. What is its molar specific heat at constant pressure?
A) 12R/5 B) 7R/3 C) 12R/7 D) 12R/5 E) 4R
_______________ are objects of known luminosity used for finding distances
Fill in the blank(s) with correct word
Given that a force vector extends from the origin to (120 N, -60.0 N), find the magnitude of the vector.
A. 140 N B. 134 N C. 180 N D. 60.0 N