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Eduardwww [97]
2 years ago
11

Which liquid is more dense ???? alcohol or water

Physics
1 answer:
Nady [450]2 years ago
4 0
Water<span> is </span>denser<span> than </span>alcohol<span> because its molecules can pack tightly together, which means that it has </span>more<span> mass in the same volume than </span>alcohol<span> </span>
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A spring with a rest length of 0.7 m has a spring constant of 70 N/m. It is stretched and now has a length of 2.5 m. What is the
pentagon [3]

Answer:

<em>113.4 J</em>

Explanation:

<u>Elastic Potential Energy</u>

Is the energy stored in an elastic material like a spring of constant k, in which case the energy is proportional to the square of the change of length Δx and the constant k.

\displaystyle PE = \frac{1}{2}k(\Delta x)^2

The spring has a natural length of 0.7 m and a spring constant of k=70 N/m. When the spring is stretched to a length of 2.5 m, the change of length is

Δx = 2.5 m - 0.7 m = 1.8 m

The energy stored in the spring is:

\displaystyle PE = \frac{1}{2}70(1.8)^2

PE = 113.4 J

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The answer is NOT covalent , it is Hydrogen .

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3 years ago
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Answer:

d.

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2 years ago
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