10 joules of heat energy are transferred to a sample of ideal gas at constant pressure. As a result, the internal energy of the gas

A. increases by 10 J
B. increases by less than 10 J
C. increases by more than 10 J
D. remains unchanged.


B. increases by less than 10 J

Physics & Space Science

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Earth orbits the Sun _____

A) once a year B) twice a year C) three times a year D) four times a year

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Titan is Neptune's largest satellite

a. True b. False Indicate whether the statement is true or false

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Hubble's constant is a "constant" in that its value

A) is the same across all of space and does not change on human time scales. B) stays the same at all times. C) is a value calculated from models, and therefore not affected by observations. D) always stays the same unless the expansion rate is accelerating.

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A ruby laser delivers a 2.28-J pulse in approximately 50 nanoseconds. The wavelength of the light is 694.4 nm. At least how many atoms within the ruby rod had to be excited to allow this high-energy laser pulse? (h = 6.63 × 10^-34 J×s, c = 3.00 × 10^8 m/s, 1 eV = 1.6 × 10^-19 J, and 1 nm = 10-9 m)

a. 3 × 10^19 c. 8 × 10^18 b. 4 × 10^18 d. 6 × 10^20

Physics & Space Science