Compared to the energy it takes to separate oxygen and hydrogen from water, the amount of energy released when they recombine is

A) slightly more.
B) slightly less.
C) much more.
D) much less.
E) the same.


Answer: E

Physics & Space Science

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A rock is thrown downward from an unknown height above the ground with an initial speed of 10 m/s. It strikes the ground 3.0 s later. Determine the initial height of the rock above the ground.

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Electrons in atoms move about the nucleus in well defined circular orbits

Indicate whether the statement is true or false

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Which of the following methods describes the transit method for detecting extrasolar planets?

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When a positronium atom decays, it emits two photons. What are the energies of the photons?

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