Which holds more | Italian
Channel: Arvind Gupta
Date: 2017-04-12

This experiment is totally counter intuitive.
You need two post cards, cello tape and some sand.
Take two similar post cards.
Take one fold along the width and tape the entire joint.
This will make a fat and short cylinder.
Now fold the second post card and fold it along the length.
Tape the joint to make a tall and thin cylinder.
Both the cylinders will have the same surface area
As they have been made from similar post cards.

Now stand the fat cylinder in a tray.
Place the thin cylinder inside the fat one.
Fill the thin cylinder with sand up to the brim.
Now shake out the thin cylinder.
You will be in for a surprise.
The fat cylinder will only be 2/3rds full.
Both cylinders have the same surface area but different volumes.
This is totally counter intuitive.

This work is supported by IUCAA (www.iucaa.in) and TATA Trust (http://www.tatatrusts.org/) and (www.tata.com/aboutus/sub_index/Tata-trusts)

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

Credits:,Ashok Rupner, Pradnya Pujari, Shivaji Mane, Jyoti Hiremath, Arvind Gupta

Dubbed in Italian by Anna Zanoli