Temperature change from supplied energy
A heater supplies \(20000\,\text{J}\) to \(1\,\text{kg}\) of water in a piston gas investigation. Use \(c=4200\,\text{J kg}^{-1}\text{K}^{-1}\). Calculate the temperature change. Use the diagram first, then calculate the requested value. Enter the numerical result and choose the interpretation that matches the physics meaning.
Worked practice: physics data and result
Read the physical quantities first, then calculate the result and state what it means.
Write a full answer
Now write the response in full, in your own words — this is what the exam asks for. The AI marks it on the same moves you built above (focus, evidence, technique, judgement) and gives feedback on reasoning, evidence, and expression.