When the reflection of an object is seen in a convex mirror the image will:
a. may be either real or virtual.
c. always be virtual.
b. will always be enlarged. d. always be real.
C
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You are standing on a bathroom scale in an elevator that is moving upward at constant speed, when suddenly the cable breaks. From just before to just after the cable breaks, the reading on the scale
A. increases by a little bit B. decreases by a little bit C. remains the same D. decreases to zero
The focal length of the objective lens of a telescope is 75.0 cm, and the eyepiece has a focal length of 6.00 cm. What is the magnification of this telescope?
A) 0.0800 B) 0.645 C) 450 D) 12.5 E) 200
Which of the following statements is true of the angles of incidence and reflection?
a. They are not related b. They can never be equal c. They are always equal d. They add to 90°.
Geology's best tool for establishing absolute geologic time is
a. index fossils. b. radiometric dating. c. the principle of superposition. d. the principle of cross-cutting relationships.