Acids and bases, Students will learn about acids and bases through a class discussion and then test a dilute acid and dilute base with neutral litmus paper to learn how the paper indicates something is acidic or basic.
Pulleys Plastic, Triple-Parallel, Steel Frame, With Hooks At Each End Carrying Three Plastic Pulleys Each Of Diameter 50 mm, Inner Gap Of Pulley Measures 4 mm, Overall Length Is 8.9 Cm. Capable Of Holding Over 30 Lbs Of Weight.
MDF Wheel, 6mm thick fibre board, 34mm and come with drilled centre holes for 4mm dowel, There are also available in 54mm and 74mm or you can order a mix bag
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