3 years ago

Which of these is an example of a mechanical wave?

Physics

2 answers:

Oduvanchick [21]3 years ago

8 0

i think the answer is B police siren.

Vikki [24]3 years ago

6 0

The answer to this B police siren

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What is the mass of a baseball clocked moving at a speed of 105 mph or 46.9 m/s and wavelength 9.74 × 10-35m?

Andrew [12]

For this problem to be solved, we make use of the de Broglie formula which is written below as follows:

λ = h/mv
where h is 6.626×10⁻³⁴ J·s

9.74 × 10⁻³⁵ m = 6.626×10⁻³⁴ J·s/ (m)(46.9 m/s)
Solving for m,
m = 0.145kg

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3 years ago

The speed of sound in air is 348m/s what is the tempructure ?

Yuki888 [10]

Answer:

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3 years ago

Diagnostic ultrasound of frequency 4.50 MHz is used to examine tumors in soft tissue. (a) What is the wavelength in air of such

mafiozo [28]

(a) $7.62 \times 10^{-5} m$ is the wavelength in air of such a sound wave.

(b) $3.33 \times 10^{-4}\ m$ is the wavelength of this wave in tissue.

Explanation:

Frequency and wavelength can be related by the equation,

Velocity = Wavelength x Frequency

$v=\lambda \times f$

where,

v - velocity of light for all EM (electromagnetic) waves in vacuum

Given:

f - 4.50 MHz = $4.50 \times 10^{6} \mathrm{Hz}$

a) To find the wavelength in air

We know,

Speed of sound in air = 343 m/s

Apply given frequency and speed of sound in air, we get

$\lambda=\frac{v}{f}=\frac{343}{4.5 \times 10^{6}}=76.2 \times 10^{-6}=7.62 \times 10^{-5}\ \mathrm{m}$

b) If the speed of sound in tissue is 1500 m/s, find the wavelength of this wave in tissue

Speed of sound in tissue, v = 1500 m/s

$\lambda=\frac{v}{f}=\frac{1500}{4.5 \times 10^{6}}=333.33 \times 10^{-6}=3.33 \times 10^{-4} \mathrm{m}$

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3 years ago

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Leni [432]

Answer:

Convex lens

Explanation:

hope this helps

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3 years ago

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How can recycling impact the environment

brilliants [131]

Answer:

A. It uses less energy to make something from recycled materials than from new materials.

Explanation:

I think it is this one because it is the only one that is not harmful to the environment. Also, I took the test a few minutes ago.

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4 years ago