Edexcel A-Level Physics AS 1.4.23 Density Questions

Practise Edexcel IAL Physics 1.2.1 by calculating density, mass and volume, converting units and comparing material ranges.

Exam points

calculate density, mass or volume using ρ=m/V with solids, liquids or flowing fluids
convert units and use geometric volumes for prisms, spheres, cubes, pipes or paper stacks
compare calculated density with material ranges using percentage uncertainty or difference

[Maximum number: 4]

A student was given a collection of old coins.
She placed the coins alongside a ruler, as shown, to determine the diameter and thickness of the coins.

Figure for Question Edexcel A-Level Physics AS 1.4.23 Density Questions question 1 — Edexcel A-Level Physics AS

(a)

The mass of the 20 coins shown is 196 g .

Determine the average density of the coins.

Average density =

[ 2 ]

Use of $\rho=m / V$

- $\rho$ between 8000 and $8600 \mathrm{~kg} \mathrm{~m}^{-3}$

Allow ecf for V from 1(a) for both marks.

Example of calculation

$\rho=m / V$ $\rho=0.0098 \mathrm{~kg} / 1.18 \times 10^{-6} \mathrm{~m}^{3}$ $\rho=8300 \mathrm{~kg} \mathrm{~m}^{-3}$

(b)

Determine whether the coins could be made from brass.
density of brass $=8550 \mathrm{~kg} \mathrm{~m}^{-3} \pm 2 \%$

[ 2 ]

All question bank results loaded

Edexcel A-Level Physics AS 1.4.23 Density Questions question 1

Question (a)

Question (b)