Energy from the Sun is released by nuclear fusion - AQA - GCSE Physics - Question 2 - 2021 - Paper 1

To calculate the energy required (E), we use the equation:

$E = m imes c imes riangle T$

Where:

• $m = 0.004 \, \text{kg}$ (mass of deuterium)
• $c = 5200 \, \text{J/kg °C}$ (specific heat capacity)
• $riangle T = 50 000 000 \, \text{°C}$ (temperature change)

Substituting in the values:

$E = 0.004 \, \text{kg} \times 5200 \, \text{J/kg °C} \times 50 000 000 \, \text{°C}$

Calculating this gives:

$E = 1.04 \times 10^9 \, \text{J}$

1. To make sure the fusion process is possible.

2. To assess the efficiency of the process.

Generating electricity using fossil fuels releases carbon dioxide, which causes global warming.

Generating electricity using fossil fuels releases sulfur dioxide, which causes acid rain.