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by Vishal Bhatt

Introduction

This experiment will demonstrate an age old mechanism, the siphon!

    • Exercise caution when using paper cutter

    • Make sure you conduct the experiment in an area where you can drain the water.

  1. Take a plastic bottle of volume 1litre Using paper cutter, cut the bottle in half. Using paper cutter, cut the bottle in half.
    • Take a plastic bottle of volume 1litre

    • Using paper cutter, cut the bottle in half.

  2. Light a candle.
    • Light a candle.

    • Expose one end of the metal wire to the flame.

    • Make sure your fingers are not too close the flame. You could risk a thermal burn.

  3. With heated metal wire, make a hole in the middle at the base of the bottle. Make the hole big enough for the straw to go in.
    • With heated metal wire, make a hole in the middle at the base of the bottle.

    • Make the hole big enough for the straw to go in.

  4. Insert the long bendable straw into the bottle through the hole. It is important that the articulated portion of the straw should be inside the bottle. Push the straw through the hole till the top end of the straw is level with the top of the bottle.
    • Insert the long bendable straw into the bottle through the hole.

    • It is important that the articulated portion of the straw should be inside the bottle.

    • Push the straw through the hole till the top end of the straw is level with the top of the bottle.

    • Use enough glue to seal the bottle-straw interface.

    • Wait for the glue to dry.

  5. Bend the straw at the point of articulation.
    • Bend the straw at the point of articulation.

  6. Steadily, add water to the bottle. First, bring the water to a level that is right below the articulation. Notice how the water has not started to flow yet.
    • Steadily, add water to the bottle.

    • First, bring the water to a level that is right below the articulation.

    • Notice how the water has not started to flow yet.

    • Then, continue to pour water such that the level is over the articulation.

    • The water starts flowing down the straw

    • See the siphon in action!

    • The straw is not properly glued to the bottle.

    • The straw was not bent enough at the point of articulation.

Finish Line

Suhail Ahanger

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