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2 years ago

14

The sound waves a bat releases hit an object and are_____ back to the bat.

2 answers:

irakobra [83]2 years ago

4 0

Your answer will be B) reflected

hope this helps

astraxan [27]2 years ago

4 0

Answer: The correct option is B.

Explanation:

Reflection of the sound is a process in which the sound bounces back after striking the object without getting absorbed in it.

The reflection of the sound phenomenon is used by a bat to detect its prey.

The bat emits ultraviolet wave and then this wave is reflected back to the ears of bat. In this way, a bat enables to detect how far its prey is.

Therefore, the sound waves a bat releases hit an object and are reflected back to the bat.

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An electron and a proton each have a thermal kinetic energy of 3kBT/2. Calculate the de Broglie wavelength of each particle at a

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Now, to calculate the de-Broglie wavelength of the electron, $\lambda_{e}$ :

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Now,

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$\lambda_{e} = \frac{6.626\times 10^{- 34}}{9.1\times 10_{- 31}\times 2.86\times 10^{5}} = 2.55 nm$

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$\lambda_{p} = \frac{h}{m_{p}{v_{p}}$ (3)

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$v_{p}$ = velocity of an proton

Now,

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$}v_{p} = \sqrt{2\frac{\frac{3}{2}k_{b}T}{m_{p}}}$

$}v_{p} = \sqrt{\frac{3\times 1.38\times 10^{- 23}\times 1800}{1.6726\times 10_{- 27}}}$

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Using eqn (4) in (3):

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Answer:

Explanation:

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