The mechanical equivalent of heat was first determined by

A) Lord Kelvin.
B) James Joule.
C) Stefan and Boltzmann.
D) Count Rumford.
E) Con Edison.


D

Physics & Space Science

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A particle with a mass of 3.0 kg is accelerated to a speed of 0.80. The mass of this particle is now:

A. Greater than 3.0 kg B. Less than 3.0 kg C. Still 3.0 kg

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A hydrogen atom emits a photon of wavelength 657.7 nm. From what energy state to what lower energy state did the electron jump?

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Einstein earned the Nobel Prize for his

A) special theory of relativity. B) general theory of relativity. C) development of the equivalence of energy and matter, E = mc2. D) work on the particle nature of light. E) contributions to the development of the fission bomb.

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The actual depth of a shallow pool 1.00 m deep is not the same as the apparent depth seen when you look straight down at the pool from above. How deep (in cm) will it appear to be? (nwater = 1.33.)

a. 133 b. 75.2 c. 90.6 d. 117 e. 100

Physics & Space Science