Which of the following molecules is polar?

A) a
B) b
C) c
D) All are polar.
E) Only A and C are polar.


Answer: C

Physics & Space Science

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In order to simulate weightlessness for astronauts in training, they are flown in a vertical circle. If the passengers are to experience weightlessness, how fast should an airplane be moving at the top of a vertical circle with a radius of 2.5 km?

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