1) The law of constant quantity states that mass is conserved in a chemical reaction.

2) The experiment showed that there was a constant quantity of water in the container.

3) The recipe called for a constant quantity of flour to ensure the dish turned out perfect.

4) In physics, the principle of constant quantity of motion is known as Newton's first law.

5) The study found that there was a constant quantity of air pollution in the city over the years.

6) The challenge was to maintain a constant quantity of heat in the laboratory furnace.

7) The goal of the project was to achieve a constant quantity of electricity production from renewable sources.

8) The researchers observed a constant quantity of sediment accumulating on the ocean floor.

9) The machine was designed to dispense a constant quantity of liquid medicine for accurate dosing.

10) The factory implemented measures to monitor a constant quantity of raw materials entering the production line.