Calculate the density of sugar cube with a mass of 2.9grams and a length of 1.5cm ,width of 1.5cm, and height of 1.5cm

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

Which of the following units is not an official si unit