This object's density is 7 g/cm3
Just divide the mass by the volume.
The density of the object is calculated by dividing the mass (17g) by the volume (3cm^3). Therefore, the density of the object is 5.67 g/cm^3.
I'm assuming that you meant to write 3cm3 for the volume. Density = mass/volume = 21g/3cm3 = 7g/cm3.
The density of the solid is about 0.86 g/cm3
The density is calculated by dividing the mass (10g) by the volume (3cm^3). So, density = mass/volume = 10g / 3cm^3 ≈ 3.33 g/cm^3.
If you mean 3cm3 you will be happy to know that 3cm3 is the same as 3 ml
3cm3
The volume of a sphere with a radius of approximately 23.87 mililimetres.
You are free to use either unit, and you would normally choose the unit according to the size of the object whose volume you were measuring; for smaller objects you might prefer to use cubic centimeters, and for larger objects you might use cubic meters, and for even larger objects you might use cubic kilometers.
Well u need exactly 3cm3 of water to survive 3 days do work out who much in exactly u need