An ideal gas is allowed to expand adiabatically until its volume increases by 50%. By approximately what factor is the pressure reduced? (? = 5/3.)
A. 1.5
B. 2.0
C. 2.5
D. 3.0
E. 3.5
Answer: B
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If a nucleus decays by gamma decay to a daughter nucleus, which of the following statements about this decay are correct? (There may be more than one correct choice.)
A) The daughter nucleus has more protons than the original nucleus. B) The daughter nucleus has more neutrons than the original nucleus. C) The daughter nucleus has the same number of nucleons as the original nucleus. D) The daughter nucleus has fewer protons than the original nucleus. E) The daughter nucleus has fewer neutrons than the original nucleus.
A bar magnet passes through a circular loop of wire as shown below. At the instant that the middle of the magnet passes through the loop, the induced current ( as seen from the coil # 2) is
A. ccw and increasing.
B. cw and decreasing.
C. cw and increasing.
D. zero.
Quantum mechanics has accurately described the regularities of the periodic table by assigning "quantum" numbers to predict the allowed energy levels. The true statement about quantum numbers is that
A. no two electrons in the same atom can have the same set of quantum numbers. B. there are never more than 8 different sets of quantum numbers in an atom. C. they describe the position and charge of the electrons in the atoms. D. no electrons in the world can ever have the same set of quantum numbers.
What are the important relics of the lepton epoch? Why are they important?
What will be an ideal response?