Basic General Knowledge
What is the measurement of the volleyball court?

5 m x 4 m divided into two parts by a net
12 m x 11 m divided into two parts by a net
18 m x 9 m divided into two parts by a net
8 m x 7 m divided into two parts by a net

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Basic General Knowledge
On a night when the sky is clear, the temperature may dip considerably; on a cloudy night the temperature will usually dip much less. The reason for this difference is that

current of air carry the heat away from the earth on a clear night
the clear sky allows the cold of outer space to reach the earth
on a cloudy night the clouds are warm and therefore retard the cooling
the clear sky allows radiant energy to escape readily from the earth

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