How to use in-sentence of “flat surface”:
– The flat surface of the plate or stone is slightly roughened, or etched, and divided into hydrophilic regions that accept a film of water and repel the greasy ink, and hydrophobic regions which repel water and accept ink.
– Electricity makes the flat surface hot.
– A gong with a flat surface gives a “crash” rather than a tuned note.
– For desktop computers, the mouse is placed on a flat surface such as a mouse pad or a desk and is placed in front of your computer.
– Minkowski spacetime has a metric signature of, and describes a flat surface when no mass is present.
