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6. (a) Describe, in terms of particles, two differences between a solid and a liquid of the same substance - Edexcel - GCSE Physics Combined Science - Question 6 - 2021 - Paper 1
Question 6
6. (a) Describe, in terms of particles, two differences between a solid and a liquid of the same substance. 1. 2. (b) Figure 13 shows the dimensions of a solid bl... show full transcript
Worked Solution & Example Answer:6. (a) Describe, in terms of particles, two differences between a solid and a liquid of the same substance - Edexcel - GCSE Physics Combined Science - Question 6 - 2021 - Paper 1
Step 1
Describe, in terms of particles, two differences between a solid and a liquid of the same substance.
Answer
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In a solid, the particles are closely packed together, whereas in a liquid, the particles are farther apart and can move more freely.
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The particles in a solid vibrate in fixed positions, while the particles in a liquid flow past one another, allowing liquids to take the shape of their container.
Step 2
Calculate the mass of the concrete block.
Answer
First, we need to find the volume of the concrete block using the dimensions provided:
a) Volume (V) = length × width × height = 1.5 m × 1.0 m × 0.20 m = 0.3 m³
b) Now, use the mass equation: m = ρ × V = 2100 kg/m³ × 0.3 m³ = 630 kg
Therefore, the mass of the concrete block is 630 kg.
Step 3
Step 4
Plan how the student could confirm the teacher’s statements, by determining the density of each of the strips as accurately as possible.
Answer
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Measure the length and width of each metal strip using a ruler to calculate the volume.
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Measure the thickness of the strip with a caliper or a micrometer for accuracy.
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Measure the mass of each strip using an electronic balance.
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Use the formula for density: