6.9kg/m3
The value "6.9 kg/m^3" represents the density of a substance or material.
To calculate density, you need to know both the mass and the volume of the substance. The formula for density is:
Density = Mass / Volume
In this case, the density is given as 6.9 kg/m^3. This means that for every cubic meter of the substance, it has a mass of 6.9 kg.
If you want to find the mass of a specific volume of the substance, you can rearrange the formula:
Mass = Density * Volume
For example, if you have a volume of 2 cubic meters of the substance, you can calculate the mass by multiplying the density (6.9 kg/m^3) by the volume (2 m^3):
Mass = 6.9 kg/m^3 * 2 m^3
= 13.8 kg
Similarly, if you know the mass and want to find the volume, you can rearrange the formula:
Volume = Mass / Density
For example, if you have a mass of 10 kg, you can calculate the volume by dividing the mass by the density (6.9 kg/m^3):
Volume = 10 kg / 6.9 kg/m^3
= 1.45 m^3
Remember, the units of density are typically in kg/m^3, where "kg" represents kilograms and "m^3" represents cubic meters.