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Flauer [41]
3 years ago
6

A boy is playing with a water hose, which has an exit area of

Physics
1 answer:
Nookie1986 [14]3 years ago
7 0

Answer:

The exit velocity of water is  B. 15 m/s.

Explanation:

According to equation of continuity, for a steady flow of water, the volume of liquid entering a pipe in 1 second is equal to the volume that leaves per second.

If the initial exit area of the pipe is A₁ and the speed of exit is v₁ and the final exit area is A₂ and its corresponding exit velocity  is v₂, then,

Rewrite the expression for v₂.

Substitute 10 cm² for A₁, 2 cm² for A₂ and 3 m/s for v₁.

The exit speed of water from the hose is 15 m/s.

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Determine the length of a wind instrument, assuming that it is modeled as a closed tube and that the lowest sound that it can pl
Alex787 [66]

Answer:

Length, l = 0.866 meters

Explanation:

Given that,

Frequency of sound, f = 99 Hz

Speed of sound in air, v = 343 m/s

To find,

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Solution,

The standing wave will gets formed in wind instrument. For the closed tube, the closed tube the frequency is given by :

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So, the length of a wind instrument is 0.866 meters. Hence, this is the required solution.

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3 years ago
Three collinear forces,F1=45N west,F2=63N east and an unknown force F3 are applied to an object.The resultant force of the three
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Write a question you would like to see on a quiz to calculate NET FORCE.
Pie

Answer:

How do you find the net force?

Explanation:

i think this is want you asked for?

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