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For all intents and purposes, the mass of 1 cm3 of pure water is 1 gram, at its maximum density (around 4 deg C) and a pressure of 1 atmosphere. So 200 cm3 would have a mass of 200 grams.

Q: How do you work out the mass of 200 cm 3 of water?

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Nothing can have a volume of 200 cm. That is a measure of length: in 1-dimensional space, not a measure of volume in 3-dimensional space.

By unit of length and mass and conversion ,we can say that 1 m=100 cm 2 m=200 cm

150g

4*6*8=192cm3 Since 1cm3 of water has a mass 1g this is 192g of water

It is 0.825g/cm^3. Use the area of the wood to find the area of the water displaced with a depth of 1.65. This will give you the volume of the water and multiply that by it's density(1000kg/m^3) to reveal the mass of the water. The mass of the water should be equal to the mass of the wood. Divide this mass by the volume of the wood(not the water segment), which will give you the density of the wood block. Be careful with the unit conversions, you may do the right math, but still have the wrong answer.

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Nothing can have a volume of 200 cm. That is a measure of length: in 1-dimensional space, not a measure of volume in 3-dimensional space.

120/200=0.6 grams per cc

Density is mass/volume. For a rectangular block, the volume is [width x height x length].Assuming you meant 10 cm for width, instead of 10g, then:Volume = (10 cm)*(2 cm)*(10 cm) = 200 cm3Density = mass/volume = (200 g)/(200 cm3) = 1 g/cm3

By unit of length and mass and conversion ,we can say that 1 m=100 cm 2 m=200 cm

Density = mass/volume , so 200/50 = 4 g / cubic cm.

150g

1000 cubic cm

Density = Mass/Volume = 200 g / 5 cm3 = 40 gcm-3

0.6 g

Volume = 3 cm x 2 cm x 10 cm = 60 cm3 Mass of 60 cm3 water = 60 grams Mass of box + contents would be >60 gramsbefore it could sink.

4*6*8=192cm3 Since 1cm3 of water has a mass 1g this is 192g of water

It is 0.825g/cm^3. Use the area of the wood to find the area of the water displaced with a depth of 1.65. This will give you the volume of the water and multiply that by it's density(1000kg/m^3) to reveal the mass of the water. The mass of the water should be equal to the mass of the wood. Divide this mass by the volume of the wood(not the water segment), which will give you the density of the wood block. Be careful with the unit conversions, you may do the right math, but still have the wrong answer.