Question
A chocolate bar contains 1.2kg of energy
1kg = 100j
Use this fact to work out how many joules ( j ) of energy the chocolate bar contains
1kg = 100j
Use this fact to work out how many joules ( j ) of energy the chocolate bar contains
Answers
GPT-4o mini
To find out how many joules of energy the chocolate bar contains, you can use the conversion factor provided (1 kg = 100 j).
The chocolate bar weighs 1.2 kg.
To calculate the energy in joules:
\[
\text{Energy (j)} = \text{Mass (kg)} \times \text{Energy per kg (j/kg)}
\]
Substituting the values:
\[
\text{Energy (j)} = 1.2 \, \text{kg} \times 100 \, \text{j/kg}
\]
\[
\text{Energy (j)} = 1.2 \times 100 = 120 \, \text{j}
\]
Therefore, the chocolate bar contains **120 joules** of energy.
The chocolate bar weighs 1.2 kg.
To calculate the energy in joules:
\[
\text{Energy (j)} = \text{Mass (kg)} \times \text{Energy per kg (j/kg)}
\]
Substituting the values:
\[
\text{Energy (j)} = 1.2 \, \text{kg} \times 100 \, \text{j/kg}
\]
\[
\text{Energy (j)} = 1.2 \times 100 = 120 \, \text{j}
\]
Therefore, the chocolate bar contains **120 joules** of energy.