The density of a certain type of plastic is 0.62 g/cm3. if a sheet of this plastic is 10.0 m long, 1.0 m wide, and 1 cm thick, what is its mass?

62,000g

Explanation:

Density is defined as the ratio of mass of a body to its volume.

Density = Mass/Volume

Given density = 0.62g/cm³

Volume = length×width×thickness

Length = 10m = 1000cm

Width = 1m = 100cm

Thickness= 1cm

Volume = 1000×100×1

Volume = 100,000cm³

Mass = Density × volume

Mass = 0.62g/cm³ × 100,000cm³

Mass = 62,000g

Its mass is 62,000g

Note that the units have to consistent, hence the reason for conversion of the meters to centimeters.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

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