Our Solar System formed 14 billion years ago with the Big Bang
a. True
b. False
Indicate whether the statement is true or false
False
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Which of the following is true about irregular galaxies?
A) They were more common when the universe was younger. B) They have significant spheroidal component. C) They are composed solely of old stars. D) They have well defined spiral arms. E) They have reddish colors.
A problem with the Bohr model of the atom is that electrons circling the nucleus
A) accelerate and should continuously emit radiation. B) lose energy and should spiral into the nucleus. C) both of these D) neither of these
You would expect millisecond pulsars to be
A) isolated in space. B) part of a binary system. C) most common in open clusters. D) collapsing rapidly. E) rotating slowly.
An up quark has charge +2/3, a down quark has charge -1/3, and a strange quark has charge -1/3. The Lambda0 particle is formed by a combination of an up, a down, and a strange quark. What is its charge?
A. 0 B. 1 C. +2/3 D. -2/3 E. -1