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Leni [432]
3 years ago
7

Which of the following is a pure substance that can't be separated by physical means, and can't be decomposed into other substan

ces by chemical means?
Question 1 options:

compound


mixture


element


molecule
Physics
2 answers:
g100num [7]3 years ago
6 0

Your answer is C. element

Nesterboy [21]3 years ago
3 0

Answer:

The answer is option C

Explanation:

ELEMENT: A substance that cannot be disintegrated (broken down) into simplistic substances by conventional chemical medians. For instance: gold, iron, carbon, hydrogen, oxygen, nitrogen. Every element possesses individual physical and chemical characteristics.

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If y = 0.02 sin (30x – 200t) (SI units), the frequency of the wave is
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Answer:

31.831 Hz.

Explanation:

<u>Given:</u>

  • \rm y = 0.02\sin(30x-200 t).

The vertical displacement of a wave is given in generalized form as

\rm y = A\sin(kx -\omega t).

<em>where</em>,

  • A = amplitude of the displacement of the wave.
  • k = wave number of the wave = \dfrac{2\pi }{\lambda}.
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On comparing the generalized equation with the given equation of the displacement of the wave, we get,

\rm A=0.02.\\k=30.\\\omega =200.\\

therefore,

\rm 2\pi f=200\\\\\Rightarrow f = \dfrac{200}{2\pi}=31.831\ Hz.

It is the required frequency of the wave.

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Answer:

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Explanation:

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