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AlexFokin [52]
3 years ago
8

I DO NOT WANT LINKES OR …………..

Physics
2 answers:
il63 [147K]3 years ago
4 0

1st B is correct option

2nd D is correct option

Veseljchak [2.6K]3 years ago
3 0
B-
Reasoning: a vacuum is empty space, therefore light can travel through, sound waves cannot travel through empty space!
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The bones of the middle ear cause the to vibrate and change the sound into signals.
olga nikolaevna [1]
If it is a true or false question then it is true
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Can someone write and short summary on how to hula hoop
velikii [3]
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3 years ago
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a sound has a frequency of 230 hz. what is the velocity of this sound if it has a wavelength of 46 cm?​
lapo4ka [179]

Answer:

V=f×λ

Where,

V is the velocity of the wave measure using m/s.

f is the frequency of the wave measured using Hz.

λ is the wavelength of the wave measured using m.

transform 46 cm in m = 0.46m and there u have it

Explanation:

6 0
3 years ago
A certain quantity of a liquid has a volume of 10cm at 20°C. Calculate its volume at 50°C, if it’s cubic expansivity is 10^(-3)
Pavel [41]

Answer:

10.3 cm³

Explanation:

From the question given above, the following data were obtained:

Original volume (V₁) = 10 cm³

Initial temperature (θ₁) = 20 °C

Final temperature (θ₂) = 50 °C

Cubic expansivity (γ) = 10¯³ K¯¹

Final volume (V₂) =?

γ = V₂ – V₁ / V₁(θ₂ – θ₁)

10¯³ = V₂ – 10 / 10( 50 – 20)

10¯³ = V₂ – 10 / 10(30)

10¯³ = V₂ – 10 / 300

Cross multiply

10¯³ × 300 = V₂ – 10

0.3 = V₂ – 10

Collect like terms

0.3 + 10 = V₂

10.3 = V₂

V₂ = 10.3 cm³

Thus, the volume at 50 °C is 10.3 cm³

6 0
3 years ago
Anothereeeeee freee points cuz why not
Dmitry [639]

Answer:

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Explanation:

5 0
3 years ago
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