Q: What is the density of a 75g block of wood measuring 12cm8cm9cm?

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A block of wood is sometimes used in the laboratory to elevate certain objects. Often, a lab-jack is used instead of a wooden block.

Density = Mass/Volume

A triple-beam balance can be used. The units could be g/ml the density of a normal wood is 0.88 but a wood block in density can be anything under 1 so it can be 0.95,0.54,etc. waters density is 1 and would can float on water so wood is anything below 1.

a block of ebony will sink in water because it's density is 1.2 g/cm3 and the water's density is 1g/cm3

Wood will. A solid block of aluminum will sink. Things float when their density is less than water. There are some woods that sink.

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Density= Volume/Mass. Therefore: (9x2x6)divided by 5.4g=Density. 108cm/5.4g=Density. 20=Density.

A block of wood is sometimes used in the laboratory to elevate certain objects. Often, a lab-jack is used instead of a wooden block.

Density = Mass/Volume

No. It doesn't matter how heavy a block of wood is, it depends on the density of the wood. Generally wood floats as the density of wood is lighter than the density of the water, so it would float.

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Density of wood = mass/volume

Density = mass/volume = 5.4g/(9*2*6) cm3 = 5.4/108 cm3 = 0.05 g/cm3. Balsa, one of the least dense woods, has a density of 0.16 g/cm3 which is more than 3 times the "density" of your wood! So have you discovered a super-light wood species?

A triple-beam balance can be used. The units could be g/ml the density of a normal wood is 0.88 but a wood block in density can be anything under 1 so it can be 0.95,0.54,etc. waters density is 1 and would can float on water so wood is anything below 1.

Density is mass divided by volume. This block of wood is therefore 0.75g per cubic cm.

-- The aggregate density of the wood block is 700/1000 = 0.7 the density of water. -- So, as soon as the wood has displaced 0.7 of its volume in water, it has displaced its entire weight in water, and floats. -- The wood floats with 0.7 of its volume below the surface and 0.3 of its volume above it.

Carpentars use math many times when: * Using a measuring tape * measuring a block of wood * how long to cut a block of wood * when talking about sizes of wood * and when talking about cords of firewood

A block of wood can be of different sizes; this will affect the mass, and weight, a lot. To a lesser degree, the weight of a block of wood will also depend on the density, since different types of wood have different densities.