The magnetic pole near the Earth's north geographic pole actually has to be
A. either an N or an S pole, but scientists have not determined which one yet.
B. an S pole, because it attracts the N pole of your compass needle.
C. an N pole because it repels the S pole of your compass needle.
Answer: B
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A) always a white dwarf B) always a black hole C) always a neutron star D) either a white dwarf or a neutron star E) either a neutron star or a black hole
Consider the hydrogen atom, singly ionized helium atom, and the doubly ionized lithium atom. Arrange these atoms from highest energy ground state to lowest energy ground state
a. H, He+, Li++ b. Li++, He+, H c. H, Li++, He+ d. Since each of these atoms has only one electron, they all have the same energy ground state.
The quark epoch is when ________ was/were created
A) all known matter B) everything in normal atoms C) only dark energy D) protons and neutrons that still survive E) the rapid inflation of the cosmos
Magnetic field strength about a magnet is strongest where magnetic field lines are
A) closer together. B) straightest. C) most curved. D) more spread.