Edexcel IGCSE Physics 5.3 Density equation

Practise using density = mass/volume with objects, liquids and tables, including rearranging the equation and choosing units.

Exam points

calculate density, mass or volume from table values and give a matching unit
subtract container masses before substituting into density = mass/volume
use density values to justify whether samples are made from different materials

[Maximum number: 4]

This question is about liquid nitrogen.

(a)

A teacher uses this method to find the density of liquid nitrogen.
- measure the mass of a container
- pour liquid nitrogen into the container
- measure the total mass of the container and the liquid nitrogen
- read the volume of the liquid nitrogen from the scale on the side of the container

[ 4 ]

(i)

State the formula linking density, mass and volume.

[ 1 ]

(ii)

Calculate the density of the liquid nitrogen.

Give a suitable unit.

[ 3 ]

Marking points:
- substitution
- evaluation
- matching unit

Example:
$\rho=\frac{m}{V}$ $\rho=\frac{74}{88}$ $\rho=0.84\ \mathrm{g\,cm^{-3}}$

Accept:
- $0.8409090\ldots\ \mathrm{g\,cm^{-3}}$
- ECF from incorrect mass

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5.3 Density equation question 1

Question (a)

Question (i)

Question (ii)