What type of particle is a proton? (There may be more than one correct choice.)
A) meson B) baryon C) nucleon D) lepton E) hadron
B, C, E
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Which of the following metals is most likely to recrystallize during hot-working?
(a) Aluminum (b) ?-Iron (c) Cartridge brass (d) Zirconium
How can a black hole of a few solar masses be detected?
What will be an ideal response?
Observations show that elements with atomic mass numbers divisible by 4 (such as oxygen-16, neon-20, and magnesium-24 ) tend to be more abundant in the universe than elements with atomic mass numbers in between. Why do we think this is the case?
A) The apparent pattern is thought to be a random coincidence. B) Elements with atomic mass numbers divisible by 4 tend to be more stable than elements in between. C) At the end of a high-mass star's life, it produces new elements through a series of helium capture reactions. D) This pattern in elemental abundances was apparently determined during the first few minutes after the Big Bang.
Light in a transparent material (index of refraction 1.333 ) strikes the boundary with another transparent material (n = 1.010)
(a) What is the critical angle for total internal reflection? (b) By what percent does the wavelength change going from the 1st to the 2nd material?