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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 ... 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, particles are closely packed in a fixed arrangement, whereas in a liquid, they are more loosely packed and can move freely.
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Particles in a solid vibrate around fixed positions, while particles in a liquid have more kinetic energy and can flow past one another.
Step 2
Calculate the mass of the concrete block.
Answer
To find the mass of the concrete block, we first need to calculate its volume.
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The formula for volume (V) of a rectangular block is:
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Inserting the given dimensions:
Next, we can calculate the mass using the density equation:
ho imes V$$ Where: - Density (ρ) = 2100 kg/m³ - Volume (V) = 0.3 m³ Substituting these values: $$m = 2100 ext{ kg/m}^3 imes 0.3 ext{ m}^3 = 630 ext{ 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 the metal strip using a ruler for accurate dimensions.
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Measure the thickness of the strip with a calliper for precision.
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Calculate the volume using the formula:
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Determine the mass of the strip using an electronic balance.
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Finally, use the density formula:
ext{Density} = rac{ ext{mass}}{ ext{volume}} to find the density for both strips and compare it with the known values of aluminium and stainless steel.