The insulating jacket on a hot-water cylinder is torn and large pieces of it are missing. A plumber replaces it with a new, undamaged jacket made of the same material. The water in the cylinder is kept at the same temperature as before. What is the effect of fitting the new jacket?
Energy is transferred from the water to the room at a lower rate.
Cold is transferred from the room into the water at a lower rate.
Energy is transferred from the water to the room at a higher rate.
Energy is no longer transferred from the water to the room.
104 exam-style questions on AQA GCSE Physics 1.2 Conservation and dissipation of energy, covering 1.2.1 Energy transfers in a system and 1.2.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.