Brainstorm
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Which gas is the main component of air?Anonymous voting
- Nitrogen
- Oxygen
- Carbon dioxide
- Methane
👍 1
The weight of a sword in medieval times?Anonymous voting
- Up to 2kg
- 5 kg
- 10 kg
- 15 kg
What was the occupation of the inventor of the electric chair?Anonymous voting
- Electrician
- Policeman
- Dentist
- Carpenter
What is the angle of tilt of the Earth's axis of rotation?Anonymous voting
- 0 °
- 8 °
- 19 °
- 23 °
👎 6