The bottom of a flat–bottomed aluminum boat has area = 4.0 m2 and mass = 120 kg. If two fishermen and their fishing gear with total mass of 240 kg are placed in the boat, how much lower will the boat ride in the water? (water density = 1.0 × 10^3 kg/m3)
a. 0.15 m
c. 0.075 m
b. 0.090 m
d. 0.060 m
D
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A person uses a converging lens of focal length 5.0 cm as a magnifying glass. What is the angular magnification if the person's eye is relaxed and has a near point of 25 cm?
A) 4.0 B) 5.0 C) 6.0 D) 7.0
The equivalence principle says that a person in an elevator that is in freefall feels the same acceleration as
A) a person in an elevator going up with an acceleration of g. B) a person in space, far from any gravitational source accelerating at g. C) a person in an elevator going down with an acceleration of g. D) a person in space, far away from any gravitational source with no acceleration. E) a person in orbit of Earth accelerating at g upward.
Electromagnetic waves with a wavelength of about 0.1 nm (about the size of an atom) are in which range?
A. Radio B. Microwave C. Infrared D. Visible E. Ultraviolet F. X-ray T. Gamma ray
The primary method of joining thermosetting polymers is with ___________.
Fill in the blank(s) with the appropriate word(s).