GCSE Edexcel Physics Forces & elasticity: 6. (a) Solid, liquid and gas are

Question

6. (a) Solid, liquid and gas are states of matter.
Which process describes the change from a solid to a liquid?

A  melting
B  freezing
C  evaporation
D  condensation

(b) A student determines the density of a liquid.
The student puts an empty measuring cylinder on a balance (Figure 10a).
The student then adds liquid to the measuring cylinder (Figure 10b).

Figure 10a

cm³
-----
201g

Figure 10b

cm³
-----
230g

Calculate the mass of liquid added and the volume of liquid added.
Use the information in Figures 10a and 10b.

(i) mass of liquid added = ______ g
(ii) volume of liquid added = ______ cm³
(iii) Which equation should the student use to calculate the density of the liquid?

A  density = mass + volume
B  density = mass - volume
C  density = mass x volume
D  density = volume

(c) (i) Figure 11 shows an electric kettle.
The kettle contains 1.5 kg of water.
The kettle is switched on.
Calculate the energy needed to raise the temperature of the water by 50°C.
Specific heat capacity of water = 4200 J/kg°C
Use the equation

ΔQ = m × c × Δθ

energy needed = ______ J

(ii) The amount of energy, E, needed to bring the water to boiling point is 670000 J.
The kettle has a power of 3500W.
Calculate the time, t, it takes to bring the water to boiling point.
Use the equation

P = E/t

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

Worked Solution & Example Answer:6. (a) Solid, liquid and gas are states of matter - Edexcel - GCSE Physics - Question 6 - 2019 - Paper 1

Which process describes the change from a solid to a liquid?

mass of liquid added = ______ g

volume of liquid added = ______ cm³

Which equation should the student use to calculate the density of the liquid?

Calculate the energy needed to raise the temperature of the water by 50°C.

Calculate the time, t, it takes to bring the water to boiling point.

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