Follow energy across a wall, through moving machinery and into an electrical circuit. Keep matter, energy and accounting boundaries separate.
Interactive explorationLook through a power plant, follow three separate water routes and trace energy across their walls. Balance the energy account, then investigate why a growing average can still hide empty trials.
Interactive explorationOpen a detailed engine, turn its crank, and take the assembly apart. Follow four different jobs hidden inside two very similar-looking turns.
Power a motor. Reverse its direction. Add a load and watch speed, current and turning force find a new balance.
Interactive explorationLook through a cold room and follow its refrigerant loop. Count the heat removed and the work added, then try putting both sides in the same room.
Interactive explorationOpen a house wall. Swap its added layer, make it thicker, and reverse the temperatures to see why insulation helps in winter and summer.
Close a switch. Follow a complete path. Give current a second route and discover what changes.
Take these steps at your own pace. Your place is not saved as account progress or scored.