Home | Portal | Blog | Forum | Media & Events | Submit Photo/project | Opportunities | Donate | Our Collaborators | Contact

Featured Project

  • How To make Fruit Cell,
    How To make Fruit Cell, Build Your Own Fruit electric cell Concept It is possible to make electricity with the fruit and the vegetable. A small current makes the lighting…
  • 100 Best Food science experiments and projects
    100 Best Food science experiments and projects 100 Best Food science experiments and projects Science is awesome. Food is awesome. Blending the two together rocks faces off. Teachers and parents looking for…

Abdul - Google+


Needle on the surface of water (Urdu & English)

Rate this item
(1 Vote)
Needle on the surface of water (Urdu & English) - 5.0 out of 5 based on 1 vote

 

 

Using a cardboard or a fork as a carrier, place a needle on the surface of water in a dish. Carefully remove the carrier.
You will see that: The needle will float.

Explanation: The needle is heavier than the amount of water it displaces and should be expected to sink. It ~oats, however, because of an invisible elastic skin. When water comes in contact with air, the molecules on the surface of the water huddle closer together and form a thin film or skin over the surface. 2. Dip a piece of soap in your dish with the floating needle. You will see that: The needle sinks immediately.

Explanation: The soap reduces the surface tension. it is one of the reasons we use soap for cleaning. By lowering surface tension, soap makes water able to wet greasy surfaces.

Media

Leave a comment

Make sure you enter the (*) required information where indicated.\nBasic HTML code is allowed.

Top Rated Experiments in Urdu

D-I-Y

Science 4 Youth Science Week

Latest Video

  • Hovercraft made by PSC Members in 2006 Hovercraft made by PSC Members in 2006 at Srfaraz pilot[…]

Popular Experiments in Urdu

D-I-Y

IEEE Karachi Section Workshop and Science Fair