Pressure and Depth
2 marks · NormalA student measures the depth and pressure difference in a tank of an unknown liquid. The table shows her results. Calculate the density of the liquid.
| Depth (m) | Pressure Difference (Pa) |
|---|---|
| 0.50 | 4900 |
| 1.00 | 9800 |
| 1.50 | 14700 |
Take .
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
1000 kg/m^3 (±10)
Common mistakes: Incorrect substitution; Reversing the formula
Show mark scheme and worked solution
Marking points
M1 · 1 mark · Uses p = hρg, rearranges for ρ.
A1 · 1 mark · Substitutes values correctly (e.g., 4900 = 0.5 x ρ x 9.8), finds ρ = 1000 kg/m³. (follow-through)
Worked solution