The earliest atmosphere of Earth was ____. A)essentially the same ...

[c0205847]

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.

[bpool94]

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]

Gracias!

[bulacsom]

Thanks for the timely response, appreciate it