Steel Tuning Fork Pair with Wood Bases, 440Hz (One Adjustable) Plastic Labware_Plastic Beakers & Jugs Virtually friction-free 2-meter air track

Virtually friction-free 2-meter air track shipped with vehicles

Hand-painted dicot root transverse section model exposes epidermis

reading -50 to 300°C at ±1°C accuracy up to 200°C for a range of lab heating

the candy-bar form letting students break each piece into smaller magnets that retain their own north and south poles

Steel Tuning Fork Pair with Wood Bases, 440Hz (One Adjustable) Plastic Labware_Plastic Beakers & Jugs Virtually friction-free 2-meter air trackAdjustable mass on one fork shifts its 440Hz pitch by a few hertz, producing audible beats when sounded against its fixed frequency partner on the matching wooden resonance base.