Pressure and Depth
3 marks · EasyA column of treacle is 0.80 m high in a tube. The density of treacle is 1420 kg/m³, and g = 10 N/kg.
(a)[1 mark]
Write the equation for the pressure difference across the treacle.
(b)[2 marks]
Calculate the pressure difference between the top and bottom of the column.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
(a) p = h × ρ × g
(b) 11,360 Pa
Common mistakes: Omitting a value, calculation error
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · Writes correct formula for pressure difference.
M1 (b) · 1 mark · Substitutes correct values into formula.
A1 (b) · 1 mark · Evaluates final answer and gives correct unit (Pa).
Worked solution
a) p = h × ρ × g