Vision Problems: If the back of a person's eye is too close to the lens, this person is suffering from
A. nearsightedness.
B. spherical aberration.
C. astigmatism.
D. chromatic aberration.
E. farsightedness.
Answer: E
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A. 0.60 B. 0.67 C. 0.80 D. 1.2 E. 1.7
A baseball player is running to second base at 5.03 m/s. When he is 4.80 m from the plate he goes into a slide. The coefficient of kinetic friction between the player and the ground is 0.180. What is his speed when he reaches the plate?
A) 4.47 m/s B) 2.89 m/s C) 1.96 m/s D) 2.56 m/s E) He stops before reaching the plate.
Which of the following molecules would you expect to be the least attracted to a Na+ ion?
A) H-F B) H3C-CH3 C) Cl2CH2 D) F- E) HO-
The "redshift" of a galaxy refers to the rate
A) at which is receding. B) at which it is approaching. C) at which it is spinning. D) of its fusion.