2 (a) Describe, in terms of particles, two differences between a solid and a liquid of the same substance. 1 2 (b) Figure 3 shows the dimensions of a solid block of concrete. Density of concrete, ρ_c = 2100 kg/m³. Calculate the mass of the concrete block. mass of concrete block = ....................... kg 4 State two practical ways to reduce heat loss from this shed. 1 2 (d) On a very cold day, the temperature of the air is -4°C. Calculate the value of this temperature on the kelvin scale. temperature = ........... K

GCSE Edexcel Physics Combined Science Density ρ: 2 (a) Describe, in terms of part

2 (a) Describe, in terms of particles, two differences between a solid and a liquid of the same substance - Edexcel - GCSE Physics Combined Science - Question 2 - 2021 - Paper 1

Question 2

2-(a)-Describe,-in-terms-of-particles,-two-differences-between-a-solid-and-a-liquid-of-the-same-substance-Edexcel-GCSE Physics Combined Science-Question 2-2021-Paper 1.png

2 (a) Describe, in terms of particles, two differences between a solid and a liquid of the same substance. 1 2 (b) Figure 3 shows the dimensions of a solid block ... show full transcript

Worked Solution & Example Answer:2 (a) Describe, in terms of particles, two differences between a solid and a liquid of the same substance - Edexcel - GCSE Physics Combined Science - Question 2 - 2021 - Paper 1

Step 1

Describe, in terms of particles, two differences between a solid and a liquid of the same substance.

96%

114 rated

Answer

In a solid, the particles are closely packed together and vibrate in fixed positions. In contrast, the particles in a liquid are also close together but are able to move freely around each other.
The particles in a solid have a regular arrangement, while the particles in a liquid are randomly arranged. Additionally, particles in a liquid have more kinetic energy compared to those in a solid.

Step 2

Calculate the mass of the concrete block.

99%

104 rated

Answer

To calculate the mass of the concrete block, we first need to find its volume. The dimensions given are:

Length = 1.5 m
Width = 1.0 m
Height = 0.20 m

The formula for volume (V) is:

$V = ext{Length} imes ext{Width} imes ext{Height}$

So,

$V = 1.5 imes 1.0 imes 0.20 = 0.30 ext{ m}^3$

Now, we can use the density formula to find the mass (m):

ho imes V$$ Where: - Density, $\rho = 2100 \, \text{kg/m}^3$ - Volume, $V = 0.30 \, \text{m}^3$ Thus, $$m = 2100 imes 0.30 = 630 \, \text{kg}$$

Step 3

State two practical ways to reduce heat loss from this shed.

96%

101 rated

Answer

Insulating the walls and roof of the shed to minimize heat transfer.
Installing double-glazed windows to reduce heat loss through the glass.

Step 4

Calculate the value of this temperature on the kelvin scale.

98%

120 rated

Answer

To convert the temperature from Celsius to Kelvin, we use the formula:

$K = °C + 273.15$

For -4°C:

$K = -4 + 273.15 = 269.15 \, K$

2 (a) Describe, in terms of particles, two differences between a solid and a liquid of the same substance - Edexcel - GCSE Physics Combined Science - Question 2 - 2021 - Paper 1

Worked Solution & Example Answer:2 (a) Describe, in terms of particles, two differences between a solid and a liquid of the same substance - Edexcel - GCSE Physics Combined Science - Question 2 - 2021 - Paper 1

Describe, in terms of particles, two differences between a solid and a liquid of the same substance.

Calculate the mass of the concrete block.

State two practical ways to reduce heat loss from this shed.

Calculate the value of this temperature on the kelvin scale.

Join the GCSE students using SimpleStudy...