Labs
A lab is not a worked example with the numbers left blank. You bring the question, or you take the reading; either way you decide what to try, and the record keeps what you did — including the conjectures that turned out to be wrong and the measurements that came out badly, which are the ones worth having made.
Your work is saved on this device as you go, so you can close the page and pick a lab up where you left it. It is not on your account yet — another device starts fresh.
Measuring g by free fall
6 stagesDrop a ball from a measured height, time the fall, and work out the acceleration due to gravity from your own readings — with the instruments a school bench actually has.
Open this labStages in orderVerifying Ohm's law
6 stagesTurn a rheostat through its settings, read a voltmeter and an ammeter at each one, and find a resistor's resistance from your own graph of voltage against current.
Open this labStages in any orderMeasuring the speed of sound with a resonance tube
6 stagesHold a tuning fork over a tube of air, raise and lower the water until the tube answers loudest, and work out the speed of sound from where it does.
Open this labStages in orderFinding the focal length of a convex lens
6 stagesPut a convex lens on an optical bench, slide a screen until the image is sharp, and work out the lens's focal length from the distances you read.
Open this labStages in any order