pl
Viewpoint Science
28.6. 22:40
NHK WORLD-JAPAN
10 minut
Two boxes that weigh the same. Each one has two plastic bottles of water inside. We put an empty box under one of these boxes. Now, which stack is heavier?
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angielski
Two boxes that weigh the same. Each one has two plastic bottles of water inside. We put an empty box under one of these boxes. Now, which stack is heavier?