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Engineering

Harshita from Sydney asks,

I have conducted an experiment with a parachute. I was investigating whether the time taken to...

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The answer requires an additional question. Was the parachute with the...

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Biology

Dean Jones from Saskatoon asks,

Why do we not have a mouthwash that prevents plaque buildup and, hence, gum disease?

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I asked Veli-Jukka Uitto, professor and head of oral microbiology at the...

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Physics

Toby from the Internet asks,

I have seen in a TV show that by a very high magnetic force field even non-magnetic substances...

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The only materials that exhibit strong and easily observable forces with...

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Physics

Maeki Ray from Chicago,IL asks,

I'm doing a science project in which I'm trying to see if sound waves created by a computer...

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Your question is an interesting one. In the outdoors, temperature gradient...

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