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aleksley [76]
4 years ago
11

Select the correct answer. Which category of materials does concrete belong to and why? A. It’s a synthetic polymer because it’s

a product of a chemical reaction. B. It’s an alloy because it contains layers of different components. C. It’s a ceramic because it contains substances such as sand and clay. D. It’s a composite because it’s a mixture of cement, sand, and other granular pieces.
Physics
2 answers:
Feliz [49]4 years ago
4 0
D. It’s a composite because it’s a mixture of cement, sand, and other granular pieces.
Lady bird [3.3K]4 years ago
4 0

Answer:

the answer is D

Explanation:

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A string of length 100 cm is held fixed at both ends and vibrates in a standing wave pattern. The wavelengths of the constituent
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The wavelengths of the constituent travelling waves CANNOT be 400 cm.

The given parameters:

  • <em>Length of the string, L = 100 cm</em>

<em />

The wavelengths of the constituent travelling waves is calculated as follows;

L = \frac{n \lambda}{2} \\\\n\lambda = 2L\\\\\lambda = \frac{2L}{n}

for first mode: n = 1

\lambda = \frac{2\times 100 \ cm}{1} \\\\\lambda = 200 \ cm

for second mode: n = 2

\lambda = \frac{2L}{2} = L = 100 \ cm

For the third mode: n = 3

\lambda = \frac{2L}{3} \\\\\lambda = \frac{2 \times 100}{3} = 67 \ cm

For fourth mode: n = 4

\lambda = \frac{2L}{4} \\\\\lambda = \frac{2 \times 100}{4} = 50  \ cm

Thus, we can conclude that, the wavelengths of the constituent travelling waves CANNOT be 400 cm.

The complete question is below:

A string of length 100 cm is held fixed at both ends and vibrates in a standing wave pattern. The wavelengths of the constituent travelling waves CANNOT be:

A. 400 cm

B. 200 cm

C. 100 cm

D. 67 cm

E. 50 cm

Learn more about wavelengths of travelling waves here: brainly.com/question/19249186

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