Atmospheric Pressure (GCSE Physics)

If a vertical column of air has pressure difference ?p = 12 000 Pa between bottom and top, and g = 9.8 N/kg, what is the approximate mass per unit area (areal mass) of that air column? (Use ?p = areal mass × g)

Two students compare pressures: Student A says atmospheric pressure is the same in all directions at a point. Student B says pressure acts only downward. Which is correct and why?

Why do we need to know atmospheric pressure when calibrating sensitive laboratory balances?

Which instrument directly measures atmospheric pressure?

At sea level atmospheric pressure is about 101 325 Pa. Which of the following is closest to this value in kilopascals?

Why do meteorologists use station pressure corrected to sea level?

Aneroid barometers have no liquid. How do they work?

A student measures the force of the air on a square plate of side 0.50 m. If atmospheric pressure is 1.02 × 10^5 Pa, what is the force on the plate?

A vacuum pump reduces pressure inside a chamber. Which statement about the remaining gas is true as pressure falls?

When a pilot climbs to higher altitude, what happens to the absolute atmospheric pressure and why might passengers’ ears ‘pop’?

When climbing a mountain, atmospheric pressure decreases and boiling point of water falls. Why does water boil at lower temperature at altitude?