Environmental Science
The main reason why vegetables take longer to cook in boiling water at high altitudes is because:

Saturation vapor pressure decreases with increasing altitude
There is less oxygen in the air at high altitude
Water boils at a higher temperature with higher altitude
The temperature of the boiling water decreases with increasing altitude

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Environmental Science
How do red and blue light differ?

Blue light has a higher speed of propagation.
Red light has a higher intensity.
The wavelength of red light is longer.
Red and blue light have different directions of polarization.

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