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3 years ago

15

Bernoulli’s Principle states that as the speed of a fluid increases the pressure of the fluid A. decreases B. remains the same C

. increases D. none of the above

1 answer:

bekas [8.4K]3 years ago

5 0

The answer is A. It decreases

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All of the following would be questions that could be scientifically investigated except:

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All of the following would be questions that could be scientifically investigated except A.
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3 years ago

Haley is driving down a straight highway at 73 mph. A construction sign warns that the speed limit will drop to 55 mph in 0.50 m

skad [1K]

Answer: $a= -1029.97 m/s^{2}$

Explanation:

We know Haley is driving with an initial velocity of $V_{o}=73mi/h$ and then she has to change to a velocity of $V_{f}=55mi/h$ in a distance $d=0.50 mi$ , and we also know we are dealing with constant acceleration $a$ .

Therefore, the following equation will be useful:

${V_{f}}^{2}={V_{o}}^{2}+2ad$ (1)

Clearing $a$ :

$a=\frac{{V_{f}}^{2}-{V_{o}}^{2}}{2d}$ (2)

$a=\frac{{(55mi/h)}^{2}-{(73mi/h)}^{2}}{2(0.50 mi)}$ (3)

$a=-2304 mi/h^{2}$ (4)

Knowing $1h=3600 s$ and $1mi=1609.34 m$ :

$a= -1029.97 m/s^{2}$ this is the constant acceleration that will bring Haley to lower speed

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4 years ago