Visibility Questions

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Latest Questions

The colour of light used for visibility in fog is?

1)blue. 2)green. 3)red. 4)yellow.

0 answers | | Open

What percentage of the Earth's surface can we see from a plane cruising at 10,000 meters?

Given a perfect day and optimal visibility how much of the planet can we actually see at any one time from a plane at 10 km over a planet 12,742 km ...

0 answers | | Open

I had a Google account, was a participant in one Google group and managed a second group. Then I?

... established a personal gmail account and seem to have lost visibility/access to the work related groups

0 answers | | Open

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