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Chemistry

Pankhuri Kalra from Delhi asks,

Is there any reaction which can take place without the exchange of heat with the surroundings or...

the answer

Reactions occur that are thermally neutral. That is: the products have the...

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Chemistry

Kelly from the Internet asks,

Why does an ice cube melt faster in tap water than salt water?

the answer

An ice cube does melt much faster in tap water than in salt water. The...

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Biology

Jeremy Wolf from Kintnersville, PA asks,

Has anyone tried a vaccine (attenuated, similar pathogen, killed, toxoid, or subunit vaccine) for...

the answer

I was able to find fairly good answers by going to www.google.com and typing...

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Physics

Mateusz from New York asks,

Is it true that the moon moves away from the earth a few centimeters each year? Also do satellites...

the answer

You are right that the Moon is slowly moving away from the Earth. Satellites...

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