The greater the frequency of the illuminating light on a photosensitive surface, the greater the
A) number of ejected electrons.
B) velocity of ejected electrons.
C) both of these
D) neither of these
Answer: B
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What is parallax?
a. Two lines in the same plane that never meet. b. The way an object looks the same regardless of the observer's location. c. The change in apparent relative positions of different parts of an object when seen from different angles. d. The arrangement of two parts of an object so that one is always seen as directly in front of the other. e. Two lines that cross.
Sediments deposited in an even, horizontal manner illustrate the principle of
A) superposition. B) original horizontality. C) succession. D) conformity.
An ideal fluid, of density 0.90 × 103 kg/m3, flows at 5.0 m/s through a level pipe with radius of 0.5 cm. The pressure in the fluid is 1.3 × 105 N/m2. This pipe connects to a second level pipe, with radius of 1.6 cm. Find the speed of flow in the second pipe.