Which is always true of an uncharged object?
a. It has no charge whatsoever in any part of its structure.
b. It has equal amounts of positive and negative charge.
c. It is grounded.
d. It is not attracted by a charged object.
e. It is composed of positively charged electrons and negatively charge protons.
b
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Which of the following quantities is directly proportional to the time interval after a projectile has left the barrel that shot it out? The x axis is horizontal; the y axis is vertically upward.
A.
B.
C.
D.
E.
The Huygens probe of the ESA made a successful landing on
A) Mars. B) Saturn. C) Europa. D) Titan. E) Triton.
An optic fiber is made of clear plastic with index of refraction of 1.50, surrounded by air. For what angles of incidence ? will light remain within the plastic fiber?
A) ? ? 21.1° B) ? < 38.3° C) ? > 38.3° D) ? < 41.8° E) ? > 41.8°
Which of the following is the most reasonable estimate of the number of characters (typed letters or numbers) in a 609-page book? Assume an average of 194 words per page and a reasonable average number of letters per word
A) 5 × 105 char B) 5 × 107 char C) 5 × 106 char D) 5 × 104 char