Hole mobility leads to faster conduction across the active layer.

Her fingertips scraped across the thin layer of sand scattered across the high mountain road.

The sheets of charge cause a strong electric field and a correspondingly sharp change in voltage (electrical potential) across the double layer.

Filter drag is the resistance across the fabric-dust layer.

A hot, transparent flame spread across the layer of tangled blue felt.

Pipe 3 to 5 parallel lines of batter straight across the layer of jam from one edge to the other.

A red light suffuses the sky and huge fireballs fly across the layer, randomly exploding wherever they hit.

When a voltage is applied to the device, the electrical gradient will be largest across the thin middle layer.

To understand the processes occurring at high Rayleigh number, it is helpful to look at the mean temperature distribution across the layer.

H must be independent of z, the vertical distance across the layer.