Thợ Lặn Descartes
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Minh họa tính nén được của khí và định luật Boyle
Mục tiêu
Chế tạo thợ lặn Descartes để minh họa tính nén của khí và mối quan hệ giữa áp suất và lực nổi.
Bối cảnh
A Cartesian diver is a small inverted container partially filled with air, placed in a sealed bottle of water. When the bottle is squeezed, pressure increases, compressing the air in the diver, which becomes denser and sinks. Releasing the squeeze reduces pressure, the air expands, and the diver rises.
Cảnh báo an toàn
- No significant hazards
Vật liệu
-
Plastic bottle (1L) (1)With cap, clear
-
Small plastic condiment packet (1)Ketchup or soy sauce
-
Water (1 L)
Thiết bị
Quy trình
Fill the plastic bottle completely with water, leaving no air space.
Drop in the condiment packet. It should barely float (adjust by adding/removing water if needed).
Seal the bottle cap tightly.
Squeeze the bottle firmly. The diver should sink.
Release the squeeze. The diver should rise.
Experiment with different squeeze pressures to control the depth. Explain using Boyle's law and Archimedes' principle.
Kết quả dự kiến
When squeezed, the air bubble in the packet compresses, the packet becomes denser than water and sinks. When released, the air expands, the packet becomes less dense and rises. This demonstrates Boyle's law (P↑ → V↓) in a tangible way.
Dọn dẹp
Empty the bottle and recycle. The condiment packet can be discarded.
Chi tiết
- Danh mục
- Gas Laws
- Độ khó
- Beginner (Middle School)
- Thời gian
- 15 phút
- Chi phí ước tính
- $3,00
- Số bước
- 6
- Vật liệu
- 3