Of the four gases CO2, H2O, N2, and O2, which are greenhouse gases?

A) Only CO2
B) CO2 and H2O
C) CO2 and N2
D) all except O2
E) all four


B) CO2 and H2O

Physics & Space Science

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Briefly describe the Orion Nebula

What will be an ideal response?

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The wavelength of a periodic wave is 0.750 m. If the frequency is 425 Hz, then what is the velocity of the wave?

A. 210 m/s B. 276 m/s C. 319 m/s D. 410 m/s E. 472 m/s

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Some double-pane airplane windows darken when the inner pane is rotated. The panes are

A) thin films. B) Polaroid filters. C) optical fibers.

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Around Sun-like stars, we have, to date, only found Jupiter-like planets

Indicate whether the statement is true or false

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