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2 years ago

Elastic energy is stored when an object is stretched. Is this an example of potential or kinetic energy?

2 answers:

8 0

The correct answer is potential because kinetic energy means it’s moving. however it is stored and has the potential to be used

kakasveta [241]2 years ago

3 0

Answer:

<h2>potential </h2><h2 />

Explanation:

Each time energy is transferred into an object, two things happen.

It is either used to do work, or it is stored in the object.

If it is stored, the object is given potential energy that can be released to do work.

it is like in a coiled spring or a stretched elastic band. The energy is stored in the bonds between atoms. The bonds absorb energy as they are put under stress and release the energy as they relax (when the object returns to its original shape).

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Match the term with its description.

Ilia_Sergeevich [38]

pH(D) A compound that increases the hydroxide ions (OH-) when it is dissolved in a solution

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2 years ago

Read 2 more answers

How do you think life on Earth would be different without the evolution of angiosperms? Provide two examples, each with an expla

IrinaVladis [17]

Answer:

Without angiosperms, average annual rainfall in the area declined by 300 millimeters. In the eastern Amazon basin, the length of the wet season decreased by nearly 3 months. The extent of the wettest rainforests, which receive more than 100 millimeters of rain per month, shrank by 80%.

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1 year ago

Which of the following releases matter? A.engaging a car exhaust system B.picking up iron filings with a magnet C.turbines spinn

igomit [66]

A- engaging a car exhaust system

4 0

3 years ago

What is the molar mass of cholesterol if 0.00105 mol weighs 0.406 g?

goblinko [34]

<h3>Answer: 386.67 g/mol </h3>

Explanation:

Molar Mass = Mass ÷ Mole

= 0.406 g ÷ 0.00105 mol

= 386.67 g/mol

∴ molar mass of cholesterol = 386.67 g/mol

5 0

2 years ago

Please help me like now please

777dan777 [17]

Answer:

1-1) NaHCO3 + CH3COOH --> NaCH3COO + H2O + CO2

1-2) 0.5 mole of CO2

2-1) 2C4H10 + 13O2 --> 8CO2 + 10H2O

2-2) 4 mol CO2

Explanation:

Question 1

NaHCO3 + CH3COOH --> NaCH3COO + H2O + CO2

To balance the equation, count the number of atoms on both sides of the equation

(1 Na, 1+3+1H, 1+1+1C, 3+2Oxygen) --> (1 Na, 1+1+1C, 3+2H, 2+1+2Oxygen)

Combining the pluses will give you the following

(1 Na, 5H, 3C, 5Oxygen) --> (1 Na, 3C, 5H, 5Oxygen)

Both sides are the same, therefore the chemical equation is balanced (originally).

From the equation, we can see that 1 mole of NaHCO3 produces 1 mole of CO2.

So that means 0.5 mole of NaHCO3 would produce 0.5 mole of CO2.

Question 2

C4H10 + O2 --> CO2 + H2O

Again, count the number of atoms on both sides of the equation

(4C, 10H, 2O) --> (1C, 2H, 3O) This time left does not equal right side

You now need to find factors that can make both sides equal.

C4H10 + O2 --> 4CO2 + H2O Now the C is balanced, let's recount 

(4C, 10H, 2Oxygen) --> (4C, 8+1Oxygen, 2H) H&O is still not balanced

C4H10 + O2 --> 4CO2 + 5H2O Now the H is balanced, let's recount

(4C, 10H, 2Oxygen) --> (4C, 8+5Oxygen, 10H) O is still not balanced

C4H10 + (13/2)O2 --> 4CO2 + 5H2O Now the O is balanced

(4C, 10H, 13Oxygen) --> (4C, 13Oxygen, 10H)

But because 13/2 is a fraction, we want to eliminate that by multiplying every reactant and product by 2 (the denominator).

2C4H10 + 13O2 --> 8CO2 + 10H2O Now it's completely balanced!

(8C, 20H, 28Oxygen) --> (8C, 28Oxygen, 20H) Yayy! It's balanced.

Now, 2 mol C4H10 produces 8 mol CO2.

So 1 mol C4H10 produces 4 mol CO2.

6 0

2 years ago