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
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Indicate whether the statement is true or false
Which type of asteroid is classified as rocky, bright, and reddish?
a. C-type b. F-type c. M-type d. S-type e. V-type
A ball is thrown vertically upward. At the top of its vertical path, its velocity is
A) 0 m/s. B) 10 m/s. C) between 0 m/s and 10 m/s. D) greater than 10 m/s. E) none of the above
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?
A) 79 m/s B) 310 m/s C) 260 m/s D) 160 m/s E) 510 m/s