A sample of gas expands. Which of the following would not account for this?
1.The pressure on the gas increased.
2.The temperature of the gas increased.
3.The pressure on the gas decreased.
4.All of these could account for this.
1
Physics & Space Science
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Refracting Telescope: The length of a telescope is 2.20 m and the focal length of the eyepiece is 1.9 cm. What is the focal length of the objective lens?
A. 41 cm B. 45 cm C. 111 cm D. 218 cm E. 16 cm
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Constellations look the same from everywhere in the galaxy.
Indicate whether the statement is true or false.
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The volume of matter is due mostly to its
A) protons. B) electrons. C) both of these
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During a reaction, 1.7 × 10-4 J of energy is released. What change of mass would cause this?
A) 5.1 × 10-4 kg B) 4.3 × 10-11 kg C) 1.5 × 10-13 kg D) 4.8 × 10-18 kg E) 1.9 × 10-21 kg
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