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Author Question: The earliest atmosphere of Earth was ____. A)essentially the same as our modern atmosphere ... (Read 110 times)

c0205847

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on: Jul 13, 2018
The earliest atmosphere of Earth was ____.
 A)essentially the same as our modern atmosphere
 B)composed entirely of nitrogen
 C)composed of ozone and hydrogen
 D)blown into space by solar wind
 E)composed entirely of ozone

Question 2

Is it possible to change the velocity of a stream but have it maintain the same discharge? Explain.


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bpool94

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Reply #1 on: Jul 13, 2018
Answer to Question 1

D

Answer to Question 2

Yes. The discharge (Q) is a product of the velocity (V) and the cross-sectional area (A ); that is, Q = VA. To maintain the same discharge while changing the velocity, it is necessary to change the cross-sectional area at the same time, and in the opposite manner. For example, if the velocity is increased, the cross-sectional area would need to be decreased by an appropriate amount.


c0205847

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Reply 2 on: Jul 13, 2018
Gracias!

raenoj

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Reply 3 on: Yesterday
:D TYSM

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