Question

Explain the construction of a simple barometer

Answer 1

A barometer is a widely used weather instrument that measures atmospheric pressure (also known as air pressure or barometric pressure) – the weight of the air in the atmosphere. A barometer is typically a tube filled with mercury sitting upside down in a container filled with mercury (called a reservoir).

Answer 2

Answer:

A simple barometer consists of a long glass tube (closed at one end, open at the other) filled with mercury and turned upside down into a container of mercury. ... As air pressure increases—that is, as the air becomes heavier—it pushes more of the mercury up into the tube.