Sep 29, 2025 · A quick, safe science moment showing how a needle can float on water due to surface tension. Learn the simple steps and the science behind why liquids resist breaking their surface.

Dec 26, 2018 · From what I understand, for the needle to float without sinking, some force has to balance its weight. Since no part of the needle is under the water, buoyant force can be ruled out.

Jul 12, 2025 · Water has a much stronger surface tension than alcohol, which is why a needle can float on water but not on alcohol. Water molecules are highly polar, which means they have a strong …

Surface tension is a fascinating property of liquid. There is a thin layer of liquid molecules on its surface that can hold small objects like a needle. The surface tension of water changes quickly when soap …

Sep 7, 2021 · Don't touch it, and don't move the water, as that would cause the needle to sink in some conditions, they mostly bear it. If you drop gently some water in the basin at a distance from the …

Sep 8, 2016 · True, a needle can float on water due to surface tension that counteracts its weight. Surface tension allows the needle to rest on the water's surface without breaking through, even …

Dec 26, 2025 · For this activity, you’ll need a shallow dish filled with water, a sewing needle, and a dish soap. Start by filling a bowl with water. Using tweezers, carefully place a sewing needle on the …

Sep 16, 2019 · Here's a neat experiment you can try at home. All you need is a glass of water, a sewing needle, and a small slip of paper. Try This! Place the sewing needle on the little slip of paper and …

Feb 27, 2025 · A needle can float on water due to surface tension. The water molecules at the surface stick together, creating a "film" strong enough to support the needle's weight without it sinking.

Jul 22, 2007 · Put the needle on top of the paper. Gently lower the paper onto the water. Wait for the paper to sink - you may want to very gently push the edges down to help it. If you get it right the …