Parallelogram of Forces Apparatus with Pulleys and Weights, 26" Lab Supplies_Lab Burner Accessories Twenty-centimeter steel helical spring paired

Twenty-centimeter steel helical spring paired with 2kg

this adjustable board accommodates specimens for butterfly

Acrylic bell-in-vacuum jar with an internal 4-6V DC electric bell that fades and falls silent as the enclosed air is removed

5-inch magnifying glass at 2

lets students compare how line density per unit length controls the spacing of the resulting interference pattern

Parallelogram of Forces Apparatus with Pulleys and Weights, 26" Lab Supplies_Lab Burner Accessories Twenty-centimeter steel helical spring pairedParallelogram of forces apparatus on a 26 by 20 inch wall mountable board with two clamp on pulleys, iron nickel plated hangers, and twelve 50g slotted weights for vector addition work.