The focal length of a magnifying glass is 15 cm. If the near point of a person is 25 cm, what is the angular magnification of the glass for this person when his eyes are focused at infinity?
A) 1.7
B) 2.7
C) 3.7
D) 4.7
E) 5.7
A
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Like other solid bodies in the solar system, Earth's surface was kept molten by
A) radioactivity. B) differentiation. C) convection. D) bombardment by small bodies. E) the solar nebula.
Which of the following is the softest mineral on the Mohs scale?
a. Talc b. Gypsum c. Diamond d. Quartz
Two blocks in contact with each other are pushed to the right across a rough horizontal surface by the two forces shown. If the coefficient of kinetic friction between each of the blocks and the surface is 0.30, determine the magnitude of the force exerted on the 2.0-kg block by the 3.0-kg block
a.
15 N
b.
25 N
c.
11 N
d.
22 N
e.
33 N
As an incompressible fluid in a pipe flows past a region where the pipe gets narrower:
a. the fluid flows faster. b. the fluid flows more slowly. c. the speed of the fluid remains the same. d. the number of gallons of fluid per second increases. e. the number of gallons of fluid per second remains the same.