International Physicists' Tournament - 2026 IPT connect | IPT2026
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13. Rice Holes

If you cook rice without ever stirring it, you will find out that your well-cooked and tasty rice shows a pattern of holes like the one in the picture. Can you suggest a physical explanation for the phenomenon? Identify the relevant parameters.

Report Opposition Moderation
Brazil

6.17

Canada

6.70

Colombia

5.78

Croatia

7.50

7.50

7.22

Denmark

6.00

France

8.70

Germany (Berlin & Erlangen)

6.39

Greece

5.00

7.39

India

6.17

Italy

5.72

7.40

Poland

7.61

Switzerland

6.60

USA (OSU)

6.17

Ukraine

5.60

MEAN

6.48

6.51

6.95