GRAND RELATIVE’S PHYSICS ADVENTURE

Hello, curious humans!
I’m Grand Relative—

—and today, 
we’re putting
a freezer on trial!

Two identical containers. 
Same freezer. 
Same amount of water.

Which freezes first: 
hot water or cold water?

hot

cold

Easy! Cold water, of course!

Obviously, cold water wins!

...except when it doesn’t.

Under certain conditions, 
a hotter sample can begin
freezing or freeze sooner.

This strange possibility is called the Mpemba Effect.

But wait—this is not a magic trick.

Scientists still debate exactly
when it happens... and which
mechanism matters most!

Evaporation

Convection

Dissolved gases

Supercooling

Hot water starts with more heat to lose.

Actually forming ice is another.

Freezes first’ is not always the same as ‘cools fastest.’

Four possible troublemakers

Tiny details can 
change the race!

Evaporation: 
less water, 
plus heat escapes”

Convection:
moving water
carries heat outward

Dissolved gases:
heating changes
what’s in the water

Supercooling: 
colder water can stay
liquid below freezing

“The Mpemba Effect is not a universal rule.

Change the container,
amount, freezer, impurities, 
or
definition of ‘frozen’...

...and you may change the result.

Sometimes the strangest
physics isn’t finding 
the answer—
it’s figuring out 
the right question.