水也能粘东西吗?

• 作 者: 罗岭
• 出 处: 英语沙龙
• 发表日期: 1996年11期
• 关键词: straight firmly pull Pull 凹痕 提拉

Is water sticky? Try this to find out. On a smooth plastic or metal surface, pour out a puddle of water. Set an undented pan firmly in the puddle, making sure it is completely wet underneath. Now pull straight up on the pan. It will be hard to pull up. WHY? A principle called adhesion

Is a water sticky? Try this to find out. On a smooth plastic or metal surface, pour out a puddle of water. Set an undented pan firmly in the puddle, making sure it is completely wet underneath. Now pull straight up on the pan. It will be hard to pull up. WHY? A