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denis-greek [22]

3 years ago

7

Which statement is true for a sound wave entering an area of warmer air?

2 answers:

FromTheMoon [43]3 years ago

6 0

<h3><u>Answer;</u></h3>

A:The wave travels faster and with the same wavelength.

<h3><u>Explanation;</u></h3>

<em><u>Sound waves are mechanical waves which require a material medium for transmission. </u></em>
The transmission of sound waves involves the vibration of particles of the material medium thus movement of energy from one point to another.
<em><u>Sound waves entering a warmer air means that the kinetic energy of the air particles will increase and thus the vibration of particles will be increased and thus the speed of transmission of sound waves increases. </u></em>

Sergio [31]3 years ago

3 0

The answer is A........The sound is transferred by collisions of molecules. Therefore sound waves will travel faster on warm air because collisions of molecules of air in warm air are greater.

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Answer:

The Hydrostatic force is $F = 137.2 kN$

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Explanation:

From the question we are told that

The height of the gate is $h = 3 \ m$

The weight of the gate is $w = 7 \ m$

The height of the water is $h_w = 2 \ m$

The density of water is $\rho_w = 1000 \ kg/m^3$

Note used $h_w$ for height of water and height of gate immersed by water since both have the same value

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$h_f =3 -2$

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The center of pressure is mathematically represented as

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Where $I_g$ is the moment of inertia of the gate which mathematically represented as

$I_g = \frac{w * h_w^2}{12}$

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2 years ago

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Speed = 1.5/0.5

Speed = 3 [km/h] or 1500/1800 = 0.8333[m/s]

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2 years ago

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Answer:

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