A mug of coffee is left on a desk in a room that is cooler than the coffee.
An arrow points from the energy store that decreases to the energy store that increases. Which expression represents the transfer as the coffee cools?
kinetic energy store of the coffee ⟶\longrightarrow⟶ thermal energy store of the room
thermal energy store of the coffee ⟶\longrightarrow⟶ kinetic energy store of the room
thermal energy store of the room ⟶\longrightarrow⟶ thermal energy store of the coffee
thermal energy store of the coffee ⟶\longrightarrow⟶ thermal energy store of the room
115 exam-style questions on Edexcel GCSE Physics 8.1 Energy transfers and work, covering 8.1.1 Energy stores and transfer diagrams, 8.1.2 Ways of changing a system's energy, and 8.1.3 Work done by forces. Each one has a worked solution and a mark scheme showing where the marks go.