Environmental Science
According to Wein's displacement law, the wavelength at which maximum radiation occurs

Is proportional to the pressure
Is proportional to the temperature
Is inversely proportional to the pressure
Is inversely proportional to the temperature

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Environmental Science
Infrared and visible satellite images might provide:

A way of distinguishing between "new" and "old" clouds.
A way of determining cloud thickness and altitude.
A way of identifying clouds suitable for cloud seeding.
A way of distinguishing between wet and dry clouds.

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