Triple Fun with Straw | English | 3-in-1 Flute, Spray, Sprinkler
Channel: Arvind Gupta
Date: 2015-09-11

You can play with this wonderful 3-in toy and make it with a single plastic straw and a piece of rubber. Take a plastic straw and cut it in two roughly equal parts. Take one piece and make two triangular cuts making triangular reeds. When we blow with these reeds in mouth,  these reeds will vibrate and the straw will make a straw flute. Press the reeds a little flat to make the flute work.
Now take the rubber piece and apply glue on two sides and stick the two straw pieces. Be careful to push the flute straw over the edge to cover the other straw halfway. This ensures the blocked straw piece works like a mist.   And now you are ready to have fun. Because the straw blocks the air flow, the speed of air increases over the straw and creates a low pressure (Bernoulii's principle). This lifts the water in the straw and you can see. The rising water gets converted to fine mist spray.
If you insert a wooden in the rubber piece this becomes a sprinkler.
You can see here how the sprinkler works. Put two beads in two straws and one in the central wooden stick. Now when you spoon the beads in the straw fly away, just like the water droplets int he sprinkler, due to centrifugal force. The bead in the center however stays no matter how hard you spin because the centrifugal force at the axis is 0.

So enjoy the 3 in1 straw fun with flute, spray and sprinkler.
This work is supported by IUCAA(www.iucaa.ernet.in) and TATA Trust (www.tata.com/aboutus/sub_index/Tata-trusts)

Credits:,Ashok Rupner, Manish Jain, Pradnya Pujari, Shivaji Mane, Jyoti Hiremath, Arvind Gupta, Vidula Mhaiskar TATA Trust: Education is one of the key focus areas for Tata Trusts, aiming towards enabling access of quality education to the underprivileged population in India. To facilitate quality in teaching and learning of Science education through workshops, capacity building and resource creation, Tata Trusts have been supporting Muktangan Vigyan Shodhika (MVS), IUCAA's Children’s Science Centre, since inception. To know more about other initiatives of Tata Trusts, please visit www.tatatrusts.org