Answers will only be rewarded, if steps are shown to get to the answer. *please

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Answers will only be rewarded, if steps are shown to get to the answer. *please explain as if it were to a beginner* Thank you.

9) Water flows through a horizontal pipe of cross-sectional are 10.cm^2 at a pressure of 0.25 atm. The flow rate is 1.0 L/s. At a valve, the effective cross-sectional area of the pipe is reduced to 5.0 cm^2. What is the pressure at the valve?

A) 0.112 atm

B) 0.200 atm

C) 0.157 atm

D) 0.235 atm

E) 7.7 x 10^3 Pa

10) When atmospheric pressure changes, what happens to the absolute pressure at the bottom of a pool?

A) It does not change.

B) It increases by a lesser amount.

C) It increases by the same amount.

D) It increases by a greater amount

11) A brass rod is 40.0 cm long and an aluminum rod is 79.8 cm long when both rods are at an initial temperature of 0

Explanation / Answer

A1= 10 CM2    v1= 1 L/s

USING CONTINUITY EQUATION

A1V1= A2V2

10*1= 5* V2

V2=2L/SEC

P1= .25 ATM

USING BERNOULLIS EQN

WE HAVE

V

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