Exercises

Crystals of common table salt tend to have 90° angles between their flat sides. What causes this?

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The regular arrangement of atoms within the crystal causes the regularity of shape

The chemical bonding between sodium and oxygen atoms

The spherical shape of sodium and chlorine atoms

The presence of impurities in the salt crystal structure

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A gallon of water weighs 8 ln. What is its volume in cubic feet?

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Answer = (1) ft³

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Calculate the density

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A certain block of wood has dimensions of 4 cm by 8 cm by 40 cm. If it has a mass of 800 grams, what is its density in g/cm³?

Answer = (1)

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How much would the mass of 5 cubic meters of ice be?

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Note: ice density = 0.92 g/cm³

Answer = (1) kg

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Find the specific gravity of a material?

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Missing

What is the specific gravity of a material that has a density of 2500 kg/m³

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Why is the specific gravity of a substance equal to its density in g/cm³?

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Because specific gravity is measured in units of g/cm³

Because water's density is 1 g/cm³, so dividing by it leaves the density value unchanged in g/cm³

Because specific gravity and density are always the same measurement

Because specific gravity is a measure of mass per unit volume

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What pressure is exerted on your head?

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Suppose the entire 3-lb weight of some books rests on your head with a wooden cube between. If the cube is \(\frac14\) inch on a side, what pressure is exerted on your head?

Answer = (1) lb/in²

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Hooke's Law apply to all object wither they are elastic or not

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True

False

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if a spring has a spring constant of 3 b/inch, how far would it stretch if 10 lb were hung from its end?

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Answer = (1)

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Crystals of common table salt tend to have 90° angles between their flat sides. What causes this?

Correct Answer

Explanation

A gallon of water weighs 8 ln. What is its volume in cubic feet?

Correct Answer

Explanation

Calculate the density

Correct Answer

Explanation

How much would the mass of 5 cubic meters of ice be?

Correct Answer

Explanation

Find the specific gravity of a material?

Correct Answer

Explanation

Why is the specific gravity of a substance equal to its density in g/cm³?

Correct Answer

Explanation

What pressure is exerted on your head?

Correct Answer

Explanation

Hooke's Law apply to all object wither they are elastic or not

Correct Answer

Explanation

if a spring has a spring constant of 3 b/inch, how far would it stretch if 10 lb were hung from its end?

Correct Answer

Explanation

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