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3 years ago

Why is graphite used instead of gold or copper wires to conduct electricity in very hot situation

1 answer:

8 0

<span> Graphite has strong bonds which gives it high boiling and melting points. With a high boiling point and melting points graphite can not melt easily, and thus is why it is preferred in hot situations. </span>

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which expression represents the heat of reaction for a chemical change in terms of potential energy, pe?

Anastaziya [24]

The expression (PE products) - (PE reactants) represents the heat of reaction for a chemical change in terms of PE (potential energy).

<h3>What is potential energy?</h3>

Potential energy is any type of energy stored to perform physical work in a given period of time.

Conversely, kinetic energy is motion (movement) energy used when performing physical work.

In conclusion, the expression (PE products) - (PE reactants) represents the heat of reaction for a chemical change in terms of PE (potential energy).

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2 years ago

What is the value of x? enter your answer in the box. X = note: image not drawn to scale. Triangle g e h with segment e d such t

Elodia [21]

Triangle GED and triangle DEH are similar triangles with a common side length DE

The value of x is 24

<h3>How to calculate the value of x</h3>

To calculate x, we make use of the following equivalent ratio

$GD : DH = EG : EH$

Substitute known values

$x + 4 : 35= 44.8 : 56$

Express the ratio as fraction

$\frac{x + 4}{35}= \frac{44.8}{ 56}$

Evaluate the quotient

$\frac{x + 4}{35}= 0.8$

Multiply both sides by 35

$x + 4= 28$

Subtract 4 from both sides

$x= 24$

Hence, the value of x is 24

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8 0

2 years ago

Solve and check es001-1. Jpg The solution is c = How many extraneous solutions are there?.

nikklg [1K]

Answer:

lolollollooololloloololol yolol

Explanation:

3 1

2 years ago

4) Both lymph and venous blood flow are heavily dependent on

SpyIntel [72]

(B) Skeletal muscle contractions and variations in thoracic pressure brought on by respiratory activity are crucial for lymph and venous blood flow.

<h3>What is respiratory movement?</h3>

Mammals use the diaphragm muscle and the intercostal muscles between the ribs to breathe.

These muscles contract, causing the diaphragm to descend and the ribs to rise, which causes the lungs to expand and the air to be pulled in (see inspiration).

The converse happens when you relax; you force air out of your lungs as you exhale.

Lymph and venous blood flow depend on skeletal muscle contractions and changes in thoracic pressure brought on by respiratory exercise.

So, in healthy individuals, the chest wall and abdomen move in unison to move inward during inspiration and outward during expiration.

Changes in this pattern will enable the diagnosis of altering contributions from the respiratory muscles to the tidal breath.

Therefore, (B) skeletal muscle contractions and variations in thoracic pressure brought on by respiratory activity are crucial for lymph and venous blood flow.

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1 year ago

a student combined 45.3 ml of a 0.549 m calcium nitrate ca(no₃)₂ solution with 75.05 ml of a 1.321 m ca(no₃)₂ solution. calculat

Maksim231197 [3]

The concentration of the final solution of Ca(NO₃)₂ made by combining 45.3 mL of a 0.549 M Ca(NO₃)₂ solution with 75.05 mL of a 1.321 M Ca(NO₃)₂ solution is 1.03 M

We'll begin by calculating the number of mole of Ca(NO₃)₂ in each solution. This can be obtained as follow:

<h3>For solution 1:</h3>

Volume = 45.3 mL = 45.3 / 1000 = 0.0453 L

Molarity = 0.549 M

Mole = Molarity x Volume

Mole of Ca(NO₃)₂ = 0.549 × 0.0453

<h3>For solution 2:</h3>

Volume = 75.05 mL = 75.05 / 1000 = 0.07505 L

Molarity = 1.321 M

Mole = Molarity x Volume

Mole of Ca(NO₃)₂ = 1.321 × 0.07505

Next, we shall determine the total mole of Ca(NO₃)₂ in the final solution. This can be obtained as follow:

Mole of Ca(NO₃)₂ in solution 1 = 0.0249 mole

Mole of Ca(NO₃)₂ in solution 2 = 0.0991 mole

Total mole = 0.0249 + 0.0991

<h3>Total mole = 0.124 mole</h3>

Next, we shall determine the total volume of the final solution.

Volume of solution 1 = 0.0453 L

Volume of solution 2 = 0.07505 L

Total Volume = 0.0453 + 0.07505

<h3>Total Volume = 0.12035 L</h3>

Finally, we shall determine the concentration of the final solution. This can be obtained as follow:

Total Volume = 0.12035 L

Total mole = 0.124 mole

<h3>Concentration =?</h3>

Concentration = mole / Volume

Concentration = 0.124 / 0.12035

<h3>Concentration = 1.03 M</h3>

Therefore, the concentration of the final solution of Ca(NO₃)₂ is 1.03 M

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5 0

3 years ago