Surface tension- Why Does This Blade Sink… Then Float?! - science experiment

追加: 2026-05-07

[00:00:01][music] >> Same blade, same water, but two different results. Watch this. I drop the blade into the water. It [music] sinks immediately. But what if I try this differently? I gently place the blade on the surface. Wait, now [music] it's floating. The blade isn't lighter.

[00:00:19]Nothing changed. So what's happening?

[00:00:22]This is called surface [music] tension.

[00:00:24]When placed gently, water forms a thin skin that holds the blade. But when dropped, [music] that skin breaks and the blade sinks. Same object, different method, different result. Follow for more amazing science tricks.