
A cutaway engine cylinder shows the piston, valves and spark through the four strokes of the cycle. Students change engine speed and spark advance and watch the stroke, cycle angle, cylinder pressure and valve states update.
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This puzzle simulation lets students handle a 2x2 cube with eight corner pieces. Dragging across a face turns that layer by a quarter turn, and dragging empty space rotates the view. Scramble mixes the cube, Undo takes back a move, and a slider sets the snap speed. Readouts track moves, state, best result and time. Teachers can use it for spatial reasoning, sequencing and algorithm thinking: ask students to find a short sequence that moves one piece, then compare strategies and move counts across the class.
Yes. It is free, needs no account, and works in any modern browser on whiteboards, tablets, phones and computers.
A 2x2 cube has 3,674,160 reachable positions, and every one can be solved in 14 quarter turns or fewer.
Drag across a face in the direction you want the layer to turn. To change the viewing angle instead, drag on empty space. Press Scramble to begin a new puzzle.
No. This version counts the cube as solved when each side is a single color, in any orientation, and it then records your result as the best if it is fewer moves.
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<iframe src="https://kiwibee.io/zh/simulations/twist-cube-2x2-3d-simulation/embed" title="Twist Cube 2x2 | KiwiBee" loading="lazy" allowfullscreen style="width:100%;height:min(70vh,620px);min-height:420px;border:0;border-radius:16px"></iframe>繼續探索

A cutaway engine cylinder shows the piston, valves and spark through the four strokes of the cycle. Students change engine speed and spark advance and watch the stroke, cycle angle, cylinder pressure and valve states update.

A dam, penstock and turbine are shown in 3D. Students change the gate opening and the water level, called the head, and read the water flow, penstock water speed, electrical power and energy per day.

A medieval trebuchet swings its arm in 3D and throws a stone. Students change the counterweight mass, arm ratio and release angle, press Fire, and read the release speed, range and flight time.

Streaks of air flow around a curved wing in 3D while students change the angle of attack and airspeed. Readouts show lift, the lift coefficient, lift to drag ratio and whether the flow is normal or stalled.

A small neural network with three inputs, two hidden layers of five neurons and two outputs is drawn in 3D. Students move the input sliders and watch neuron colors, connection weights and the two outputs change.
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