A __________ has integral spin
Fill in the blank(s) with correct word
boson
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Monochromatic light of wavelength 500 nm is incident normally on a diffraction grating. If the third-order maximum of the diffraction pattern is observed at 32° from the centerline, what is the distance between the slits of the grating?
A) 0.93 ?m B) 1.4 ?m C) 2.8 ?m D) 8.5 ?m
If the presently accepted value of ?o = 0.3 (excluding dark energy) is indeed correct, then the universe will:
A) expand forever. B) expand to the critical size for the Steady State model, then become static. C) stop expanding in about forty billion years, to collapse into the next cosmic cycle. D) Two of the answers are correct. E) All of the above are correct.
You pull on a crate with a rope. If the crate moves, the rope's pull on the crate must have been larger than the crate's pull on the rope, but if the crate does not move, both of these pulls must have been equal
A) True B) False
The average distance from Earth to the sun is defined as one astronomical unit (AU). If an asteroid orbits the sun in 1/3 of a year in a circular orbit, the asteroid's distance from the sun is closest to
A) 0.48 AU. B) 0.19 AU. C) 2.1 AU. D) 0.33 AU. E) 5.2 AU.