A 50 W heater is placed in a 1.0 kg metal block. The heater is switched on for 5.0 minutes and the temperature of the block rises by 15 ∘C15\ ^{\circ}\text{C}15 ∘C.
Assume all of the energy from the heater is transferred to the block.
Use the equation: change in thermal energy=mass×specific heat capacity×change in temperature\text{change in thermal energy} = \text{mass} \times \text{specific heat capacity} \times \text{change in temperature}change in thermal energy=mass×specific heat capacity×change in temperature
What is the specific heat capacity of the metal?
17 J/kg ∘C17\ \text{J/kg}\ ^{\circ}\text{C}17 J/kg ∘C
200 J/kg ∘C200\ \text{J/kg}\ ^{\circ}\text{C}200 J/kg ∘C
1000 J/kg ∘C1000\ \text{J/kg}\ ^{\circ}\text{C}1000 J/kg ∘C
15 000 J/kg ∘C15\,000\ \text{J/kg}\ ^{\circ}\text{C}15000 J/kg ∘C
44 exam-style questions on OCR GCSE Physics 7.1 Work done, covering 7.1.1 Conservation of energy in a closed system, 7.1.2 Energy stores and transfers, 7.1.3 Energy changes by heating, forces and current, 7.1.4 Quantifying energy transfers in a system, and 7.1.5 Kinetic, elastic and gravitational potential energy. Each one has a worked solution and a mark scheme showing where the marks go.