density

Question 1

what is the formula for density?

Answer 1

density (kg/m3) = mass (kg) / volume(m3)

Question 2

what is thermal equilibrium?

Answer 2

the direction of flow of thermal energy will be from the body at a higher temp to the one with lower temp. once the bodies are at the same temperature, there is no net flow of thermal energy: they are at thermal equilibrium