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marissa [1.9K]
3 years ago
14

A fluid is forced through a pipe of changing cross section as shown. In which section would the pressure of the fluid be a minim

um?

Physics
1 answer:
DerKrebs [107]3 years ago
6 0

Answer:

straight

Explanation:

because it is good in that direction

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A 64.1 kg runner has a speed of 3.10 m/s at one instant during a long-distance event.(a) What is the runner's kinetic energy at
Liono4ka [1.6K]

Answer:

(a)  the runner's kinetic energy at the given instant is 308 J

(b)  the kinetic energy increased by a factor of 4.

Explanation:

Given;

mass of the runner, m = 64.1 kg

speed of the runner, u = 3.10 m/s

(a) the kinetic energy of the runner at this instant is calculated as;

K.E_i = \frac{1}{2} mu^2\\\\K.E_i = \frac{1}{2}  \times 64.1 \times 3.1^2\\\\K.E_i = 308 \ J

(b) when the runner doubles his speed, his final kinetic energy is calculated as;

K.E_f = \frac{1}{2} mu_f^2\\\\K.E_f = \frac{1}{2} m(2u)^2\\\\K.E_f = \frac{1}{2} \times 64.1 \ \times (2\times 3.1)^2\\\\K.E_f = 1232 \ J

the change in the kinetic energy is calculated as;

\frac{K.E_f}{K.E_i} = \frac{1232}{308} =4

Thus, the kinetic energy increased by a factor of 4.

4 0
3 years ago
At which point is the potential energy the greatest? At which point is kinetic energy the greatest?
notsponge [240]

Answer:

Kinetic energy is greatest at the lowest point of a roller coaster and least at the highest point.

<h2>hope it helps you </h2><h2>make me as brainlylist </h2>
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4 years ago
When the biker is at the top of the ramp, he has a speed of 10 m/s at
oksian1 [2.3K]

Answer:

25000

Explanation:

100 x 25 x 10 = 25000

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3 years ago
The temperature of water in a beaker is 45°C. What does this measurement represent?
julia-pushkina [17]

Your answer would be C, with a quick lookup of this question online lol
8 0
3 years ago
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Answer: I am pretty sure that you should pick radio waves.

Explanation: The scientist should use radio waves. I think this because you can use the radio waves to analyze the signals from outer space. This will work much better than anything there, to analyze it the best possible.

The best I could do.

8 0
3 years ago
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