Density and Pressure Questions and Answers

A red powder of volume 25 $\mathrm{cm^3}$ and density 0.200 $\mathrm{g/cm^3}$ and a green powder of volume 40 $\mathrm{cm^3}$ and density 0.125 $\mathrm{g/cm^3}$ were mixed to form a yellow powder.

What is the density of a piece of metal which has a mass of 450 g and a volume of 48 $\mathrm{cm^3}$?

Which one is a unit of pressure?

The SI unit of pressure is

State the definition of density in terms of mass and volume.

A stone of mass 20 g is lowered into a measuring cylinder containing 20 cm³ of water; the water level rises to 35 cm³. Calculate the density of the stone.

In the SI system of units, what is the name of the unit of time?

In the SI system of units, which physical quantity has the SI unit kelvin and the symbol K?