/u/RedditHoss's posts in /r/askscience

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When jumping a car, why does the black cable go to a grounded piece of metal?

2 upvotes

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If I wash my hands twice with soap that kills 90% of bacteria, have I killed 99% of the bacteria originally on my hands, or was the second washing useless?

1 upvotes

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Is there more oxygen in Earth's atmosphere or oceans?

1 upvotes

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Since space flight requires massive rockets, could Humans have created them if we were 2” tall?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
When jumping a car, why does the black cable go to a grounded piece of metal?	2
If I wash my hands twice with soap that kills 90% of bacteria, have I killed 99% of the bacteria originally on my hands, or was the second washing useless?	1
Is there more oxygen in Earth's atmosphere or oceans?	1
Since space flight requires massive rockets, could Humans have created them if we were 2” tall?	1