Ivanhoj
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For fans of challenging puzzles :D
Something around the 5-7th grade level from the physics section:
What will happen to a piece of ice brought into a room with a temperature of 0 degrees Celsius:
1) It will change from a solid state to a liquid state/melt/
2) There will be no changes
3) Your own option
Added 3 minutes later
Pressure, humidity? Hmm...
And who will say which is heavier - a ton of wood or a ton of iron?
Военное дело просто и вполне доступно здравому уму человека. Но воевать сложно.
