3 years ago

Which is not an element? Water , Arsenic, sodium, Aluminum

Physics

2 answers:

Lilit [14]3 years ago

6 0

Answer: Water

Explanation: water is a molecule and composed of Hydrogen and Oxygen atoms.

MrRa [10]3 years ago

3 0

Answer:

water

Explanation:

water is not an element, it is a molecule

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Answer:

Explanation:

E = σ/ε = (F/A) / (ΔL/L)

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erastovalidia [21]

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2 years ago

A 5.50-kg object is hung from the bottom end of a vertical spring fastened to an overhead beam. The object is set into vertical

iris [78.8K]

Answer:

17.71N/m

Explanation:

The period of the spring is expressed according to the expression;

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m is the mass of the object

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m = 5.50kg

T = 3.50s

Substitute into the formula;

$T = 2 \pi \sqrt{\frac{m}{k} } \\3.5 = 2 (3.14) \sqrt{\frac{5.5}{k} } \\3.5 = 6.28 \sqrt{\frac{5.5}{k} } \\\frac{3.5}{6.28} = \sqrt{\frac{5.5}{k} } \\0.557 = \sqrt{\frac{5.5}{k} } \\square \ both \ sides\\0.557^2 = (\sqrt{\frac{5.5}{k} })^2 \\0.3106 = \frac{5,5}{k}\\k = \frac{5.5}{0.3106}\\k = 17.71N/m$

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2 years ago