Magnetic compasses apparently were first used by
A) Columbus.
B) Greeks.
C) Australian aborigines.
D) Vikings.
E) pigeons,then Chinese.
Correct Answer:
Verified
Q9: Pigeons navigate primarily by
A)a good memory.
B)a keen
Q10: The force on an electron moving in
Q11: Magnetic domains normally occur in
A)iron.
B)copper.
C)silver.
D)all of these
E)none
Q12: Which pole of a compass needle points
Q13: If a steady magnetic field exerts a
Q15: The intensity of cosmic rays bombarding the
Q16: The source of all magnetism is
A)tiny pieces
Q17: Moving electric charges will interact with
A)an electric
Q18: Several paper clips dangle from the north
Q19: Compared to the huge force that attracts
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