alexisthegirl
13.04.2020 •
Physics
A bat flew 90 kilometers in one evening, returning to its cave after 3 hours.
What was the bat's average speed? A) 30 km/h B) 60 km/h C) 90 km/h D) 270 km/h
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Ответ:
Sorry im a little late. I am as well trying to look this up. But i believe you divide 90 by 3 which would give you 60 km/h. So the answer will be B.)
Ответ:
Wind - the perceptible natural movement of the air, especially in the form of a current of air blowing from a particular direction. Sound wave - a wave of compression and rarefaction, by which sound is propagated in an elastic medium such as air.
Sound wave travels faster in the air when it is with the wind. ... In contrast, when sound wave travels against the wind, that is, when it travels in the opposite direction with the wind, the speed of sound will be reduced by the wind speed, resulting in a lower speed in the upper region.
Explanation:
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