US$ 97.57
Used to trace the invisible shape of magnetic fields
Double-parallel plastic pulley with two 50mm wheels in a steel frame and end hooks
and energy transfer in a compression wave
this Wimshurst generator builds a visible high-voltage spark
and phosphorus for organic-chemistry work
Bar and Gauge Thermal Expansion Apparatus Pack Size_100 Used to trace the invisibleVisualizes linear thermal expansion through a fitted metal bar and gauge, heating the bar until it no longer passes through the opening and contraction returns it.
US$ 97.57
US$ 2200.00
US$ 158.80
US$ 90.56
US$ 80.82
US$ 98.80