Wednesday 21st May 2025
Difficulty: Medium
Just a second (Quiz #915)
1. How long is a pendulum whose period (i.e. one whole swing in each direction) is one second?
2. Sound travels about 343 metres in one second through air at 20ºC. How would this distance be affected if the air was warmer?
3. How far would you have to throw a stone vertically upwards, so that it would fall back and land in your hand one second later?
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