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Lyrx [107]
3 years ago
11

When bridges are built, special joints must be used because the material of the bridge shrinks, and without these joints, the ma

terial would break. Which of the following properties is described here? A.
Chemistry
1 answer:
marysya [2.9K]3 years ago
6 0

Expansion

Explanation:

Expansion is the change is size of a body with increasing temperature and tension.

Bridges are built of iron. Iron thermally expands in the presence of increased temperature during the day. The length of the iron will increase by simple fractions. At night, when temperature drops, the bar returns back to its initial position.

  • The allowance for expansion of the metal is made in order to prevent tension within the structure.
  • Not doing this will cause the material to break since there is no free space for the bar to change shape.

Learn more:

Expansion in gases brainly.com/question/9979757

#learnwithBrainly

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IUPAC name. Chromium(IV) oxide, Chromium dioxide.
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A diver planning to dive to a depth of 100 ft can choose to breathe air that is a mixture of oxygen, nitrogen, and helium. If th
Elodia [21]

Answer:

1216 mmHg = Partial pressure N₂

Explanation:

In a mixture of n gases, the partial pressure of each compound follows the equation:

Total pressure = Partial pressure n₁ + Partial pressure n₂ + Partial pressure n₃ + Partial pressure n₄ + Partial pressure n₅ + ... + Partial pressure nₙ

In a mixture of O₂, He and N₂, the total pressure = 3040mmHg is defined as:

3040 mmHg = Partial pressure O₂ + Partial pressure He + Partial pressure N₂

Replacing:

3040 mmHg = 304 mmHg + 1520 mmHg + Partial pressure N₂

3040 mmHg = 1824 mmHg + Partial pressure N₂

1216 mmHg = Partial pressure N₂

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3 years ago
Which number represents the water table?<br><br> 1<br> 2<br> 3<br> 4
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Answer:

I think that is number 3

Explanation:

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3 0
3 years ago
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How many molecules of glucose (C6H12O6) are present in 23.3 g of the substance?
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Answer:

11

Explanation:

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4 0
4 years ago
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A variety of factors influence enzyme activity. Substances that bind to the enzyme and interfere with substrate binding or catal
Fofino [41]
<h3>Answer:</h3>

1. Irreversible Inhibition-Inhibitor may permanently modify an enzyme

2. Irreversible inhibition- Tamiflu, a transition state analog, reversibly binds to neuraminindase

3. Competitive Inhibition-Inhibitor binds reversibly to an enzyme's active

4.Irreversible inhibition-Inhibitor binds to an enzyme at a site other than active site

5. Mixed inhibition-The Al3+ ion binds to acetylcholinesterase or to the acetylcholinesterase- substrate complex

6. Irreversible inhibition-DIPF permanently modifies the hydroxyl group of a Serine residue at the active site

<h3>Explanation:</h3>
  • An enzyme is a biological catalyst that catalysis chemical reactions.
  • Enzyme activity is influenced by several factors which include enzyme inhibitors, temperature, and pH among others.
  • Enzyme inhibitors are molecules that bind to the enzyme thus interfering with enzyme activity and preventing the binding of substrate to the enzyme.
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  • Competitive inhibitors compete with substrates for the active sites while non-competitive inhibitors bind irreversibly to other sites on the enzyme other than the active site.
  • Tamiflu is an example of a competitive inhibitor.
  • DIPF is an example of a non-competitive inhibitor as it binds the enzyme permanently.

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4 years ago
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