US$ 182.70
two acrylic triangular blocks
using a 5cm sphere with detachable hemispherical cups that lift away to test for residual charge
Steeply curved concave glass mirror at 50mm aperture and 75mm focal length
For beam balance use and chemistry mass-measurement coursework
this low-current 2mA buzzer on a demonstration base sounds whenever current flows through the closed circuit
10-Pack Chemical-Resistant Polypropylene Stoppers, 12/21 Pack Size_12 two acrylic triangular blocksPack of 10 chemical resistant polypropylene stoppers fits 12 21 joints for sealing ground joint vessels with chemical and impact resistance.
US$ 182.70
US$ 141.00
US$ 12.90
US$ 198.00
US$ 122.25
US$ 148.00
US$ 79.95
US$ 14.99