Sunspot numbers were lowest in this century:
A) seventeenth century.
B) eighteenth century.
C) nineteenth century.
D) twentieth century.
Correct Answer:
Verified
Q51: Sunspots
A)are caused by locally intense magnetic fields.
B)appear
Q52: Describe the sections of the Sun and
Q53: Differences in emissivity of a substance are
Q54: Sunspots are associated with the solar
A)core.
B)corona.
C)photosphere.
D)chromosphere.
Q55: Define and discuss the following terms involving
Q57: The solar constant is measured in _.
Q58: How long does it take for energy
Q59: Describe how Wien's law has been applied
Q60: Discuss the various factors which affect the
Q61: The earth's axis of rotation is tilted
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