What needs to be done to convert a neutral nitrogen atom into an N-3 species?
A) add three electrons
B) remove three electrons
C) remove three protons
D) add three protons
E) add three nitrogens
Answer: A
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Which of the above substances would have the largest dipole?
A) a B) b C) c D) Each has the same size dipole. E) None of the molecules has a dipole.
Pressure in a fluid decreases with depth
Indicate whether the statement is true or false
A small metal sphere is suspended from the conducting cover of a conducting metal ice bucket by a non-conducting thread. The sphere is given a negative charge before the cover is placed on the bucket. The bucket is tilted by means of a non-conducting material so that the charged sphere touches the inside of the bucket. Which statement is correct?
A. The negative charge remains on the metal sphere. B. The negative charge spreads over the outside surface of the bucket and cover. C. The negative charge spreads over the inside surface of the bucket and cover. D. The negative charge spreads equally over the inside and outside surfaces of the bucket and cover. E. The negative charge spreads equally over the sphere and the inside and outside surfaces of the bucket and cover.
The purpose of an air bag in an auto is to
A. decrease the force applied to you during a collision. B. reduce your speed just before a collision. C. reduce the impulse on you during a collision. D. make your momentum change occur over a shorter time during a collision.