3 years ago

Which of the following describes sound waves?

Physics

2 answers:

lianna [129]3 years ago

8 0

The answer is c) electromagnetic sawed in which the vibrations are perpendicular to the motion of the sound

hoa [83]3 years ago

3 0

Answer:

D. Mechanical waves in which the vibrations are parallel to the

motion of the sound

Explanation:

Ap3x

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A truck has shock absorbers with a spring constant of 24200 N/m. When it hits a bump, it oscillates at 0.429 Hz. What is the mas

siniylev [52]

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$f=\frac{1}{2\pi}\sqrt{\frac{k}{m}}$

Rewrite the above equation in terms of 'm'. This gives,

$2\pi f=\sqrt{\frac{k}{m}}\\\\Squaring\ both\ sides,\ we\ get:\\\\(2\pi f)^2=\frac{k}{m}\\\\m=\frac{k}{4\pi^2 f^2}$

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$m=\frac{24200\ N/m}{4\pi^2\times (0.429\ Hz)^2 }\\\\m=\frac{24200\ N/m}{4\pi^2\times 0.184\ Hz^2}\\\\m\approx3331.5\ kg$

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