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1.1

Minor Versionm

by Suhail Ahanger

Introduction

Insert a stick in the middle of a plastic straw, make two half cuts on two sides of the straw and fold it into a triangle. Now dip this in water and rotate to get beautiful sprinkle of water.

    • Handle scissors with care.

    • Be careful about the pokey end of the wooden stick.

  1. Measure the length of your straw. Mark it's center. Now,  mark two points 3-cm from the center of the straw. Poke the stick in the center of the straw.
    • Measure the length of your straw. Mark it's center.

    • Now, mark two points 3-cm from the center of the straw.

    • Poke the stick in the center of the straw.

  2. Make half cuts at the marked 3cm on either sides of the stick. Make half cuts at the marked 3cm on either sides of the stick. Make half cuts at the marked 3cm on either sides of the stick.
    • Make half cuts at the marked 3cm on either sides of the stick.

  3. Both arms of the straw should be able to bend. Bend the two arms of the straw to make a triangle. Stick the bent straw arms and the wooden stick with a piece of tape.
    • Both arms of the straw should be able to bend.

    • Bend the two arms of the straw to make a triangle.

    • Stick the bent straw arms and the wooden stick with a piece of tape.

    • Straw ends should be open.

  4. Place the tip of the triangle in water and spin the wooden stick with one hand. Large chunks of water will sprinkle out from the straw cuts like a centrifuge. Place the tip of the triangle in water and spin the wooden stick with one hand. Large chunks of water will sprinkle out from the straw cuts like a centrifuge. Place the tip of the triangle in water and spin the wooden stick with one hand. Large chunks of water will sprinkle out from the straw cuts like a centrifuge.
    • Place the tip of the triangle in water and spin the wooden stick with one hand. Large chunks of water will sprinkle out from the straw cuts like a centrifuge.

    • Straw openings blocked by tape.

    • Straw is either submerged too much or not at all into the water.

    • Twirling done too slowly.

    • Immerse the straw by 1 cm in the water and measure how far the water is ejected when you twirl the wooden stick.

    • Measure the angles of the triangle made by the straw.

    • Make the same toy with longer straws.

    • Make the same toy with straw arms at different angles: acute and obtuse.

    • Make the same toy with straws of different stiffness.

    • Use different liquids (e.g. oil, milk, petrol etc.) to play with the sprinkler and note down your observations.

    • Figure out the direction and trajectory of the ejected drops in the sprinkler.

    • At which angle would you get the maximum horizontal distance? What would be the advantage of keeping the angle low?

Finish Line

Vishal Bhatt

Member since: 04/26/2017

2,725 Reputation

78 Guides authored

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