At what, if any, temperature are the numerical readings on the Fahrenheit and Celsius scales the same?
A) -30°
B) -40°
C) -50°
D) -60°
E) They can never read the same because they are based on different zeroes.
B
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A system consisting of a negatively-charged particle and an electric field
a. gains potential difference and kinetic energy when the charged particle moves in the direction of the field. b. loses electric potential energy when the charged particle moves in the direction of the field. c. gains kinetic energy when the charged particle moves in the direction of the field. d. gains electric potential energy when the charged particle moves in the direction of the field. e. gains potential difference and electric potential energy when the charged particle moves in the direction of the field.
The fastest moving planet in a solar system is the
A) smallest planet. B) most massive planet. C) planet nearest the Sun. D) planet farthest from the Sun. E) all move at the same speed.
The purpose of the third prong on a common electric plug of an appliance is
A) to handle three-phase electricity. B) to provide an alternate live wire. C) to connect the appliance to zero ground potential. D) a substitute for a safety fuse. E) all of the above
A person with normal eyesight uses a converging lens of focal length 10 cm as a magnifying glass to finish an engraving job. To see detail, he holds the lens very close to his eyes. At what minimum distance from the job must he hold the lens?
A) 20 cm B) 30 cm C) 14 cm D) 9.4 cm E) 7.1 cm