Description
a set of thermal expansion and contraction experiment material for students, which is made of premium material for durable and safe in use. This professional teaching aid for physics teaching can train the student practical ability and enhance their interest in learning.
Features
- Color: As Shown
- Material: Plastic, metal
- Size: About 23. 00X4. 50X3. 00cm/ 9. 04X1. 77X1. 18in
- Teach the phenomenon and application of expanding heat and contracting cold.
- Plastic handle, light and smooth, easy to use heat insulation.
- Use the small ball through the ring at room temperature.
- The metal ball is then placed on an lamp and heated for 3- 5 minutes, it can not pass through the ring.
- Let the metal ball cool naturally, and the ball can pass the ring.
Package Including
1 x Set of Physical Teaching Aids