Discharge tubes

Pressure is getting lower from the left to the right

Seesaw

To maintain balance, the heavier child sits nearer to the rotation axis.

Wheelbarrow

It is a type of lever that has the resistance (or output force) in the middle and the effort at one side and the fulcrum on the other side of the resistance

Heating a test tube

The alcohol burner heats the test tube, and then the test tube heats the cooler water

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