Samples are injected into the system using a known amount of sample volume.

A known amount of dye (or salt) per unit time is added to a flow stream.

These measures allow a known amount of shear force to be resisted by the elements.

An unknown sample is reacted with a known amount of base.

They would prefer to pay a known amount every month.

After a known amount of time, the material is analyzed to find the concentration of the test chemical present throughout its structure.

Weigh out a known amount of powder, call it Wp.

A known amount of standard complement proteins are added to the serum.

Then, a known amount of acidic solution may be added and the change in temperature measured using a thermometer.

One copy is delayed by a known amount relative to the other.