All neutron stars seen from Earth are pulsars
Indicate whether the statement is true or false
FALSE
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How can a nucleus be described by particular values of A, Z and N when the mass of the nucleus is not equal to Zmp + Nmn, where mp and mn are the masses of free protons and neutrons?
a. A, Z and N have no intrinsic meaning. b. A, Z and N describe the number of particles of given types, but mass has no meaning when part of the mass is elsewhere in the universe. c. A, Z and N describe the number of particles an ideal rather than a real nucleus would have. d. A, Z and N describe the number of particles of given types in the nucleus, but not their masses in a bound state. e. A, Z and N describe the number of particles of given types in the nucleus since the missing mass consists of electrons that are also present in the nucleus.
The laws of conservation of energy and momentum:
a. apply in all circumstances. b. are disproved by quantum mechanics. c. do not apply at the subatomic level. d. apply to some interactions but not at all to some others. e. are broken only for unmeasurable lengths of time.
If your eyes could only see in gamma rays, what color would best describe your view of your surroundings?
a. white b. red c. violet d. black
As the polar icecaps melt, the resulting water spreads over the entire Earth. This new mass distribution tends to make the length of a day
A) longer. B) shorter. C) none of these