Laboratory / Physics
Energy and conservation
Move a system boundary around a block and ramp. Watch which terms count as internal storage and which appear as transfers across the boundary.
What changed
The initial store is 55 units; 26 units enter the thermal account. The complete ledger still balances.
Return to the route
Experiment after prediction.
Before changing a control, say which visible feature should move and which should remain invariant. That prediction is the useful part of the experiment; motion alone is not evidence.