Asilicon dioxide film formed on the surface of a silicon wafer by thermal oxidation has a thickness that is
(a) greater than, (b) less than, or (c) the same as the layer of substrate silicon used to form it.

less thickness

Explanation:

Thermal oxidation is a process where only the surface atoms react and are converted into the silicon dioxide, so unless you have a layer of silicon wafer of a one atom thickness, the thickness of the silicon dioxide will always be thinner than the silicon wafer.

sorry what a asnns

explanation:

the warning light flashes for a second or two when the engine starts. if it stays on, there's must be something wrong with the coolant. you should never dare to continue driving when the light is on. pull over as soon as possible and shut the engine off.

hope this is what you're talking about