6. (a) Solid, liquid and gas are states of matter - Edexcel - GCSE Physics - Question 6 - 2019 - Paper 1

To find the mass of the liquid added, subtract the mass of the empty measuring cylinder from the mass of the cylinder with liquid.

Mass of liquid added = 230 g - 201 g = 29 g.

The volume of the liquid can be determined by observing the increase in volume from the measuring cylinder.

Volume of liquid added = 30 cm³ - 5 cm³ = 25 cm³.

The correct equation to calculate density is D) density = mass / volume.

Using the specific heat capacity equation:

$ΔQ = m × c × Δθ$

Where:

• m = 1.5 kg,
• c = 4200 J/kg°C,
• Δθ = 50°C.

Thus,

$ΔQ = 1.5 kg × 4200 J/kg°C × 50°C = 315000 J.$

Using the equation for power:

$P = E/t$

Rearranging gives: $t = E/P$

Substituting the values:

• E = 670000 J,
• P = 3500 W,

Thus,

$t = 670000 J / 3500 W = 191.43 s.$