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Thermodynamics/nuclear explosion

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Question
I remember watching a nuclear test film on t.v.
When the explosion reached a  house, first it was blown away then the shock wave turned back on itself, is this because the initial shock wave pushed the house away before the vacuum created in the explosion ducked it back!

Answer
Hi Allan,

What happens is that a shock wave is composed of a leading high-pressure wave much like a wave at sea. To this is attached, as an ingegral part of the wave, a low-pressure wave much like a trough follows a sea wave.

Thus the house will be blown away from the blast initially and the trailing edge of the wave of low-pressure will suck the house back.

I hope this helps.

Best wishes.
Kevin.

Thermodynamics

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Kevin

Expertise

Thermodynamics, chemistry, chemical reactions, kinetics, chemical reaction safety, dust explosion technology, static electricity. General science.

Experience

Over 40 years experience as a practicing thermochemist in industry. Head of the fire and explosion laboratory of a major European chemical company (Ciba-Geigy). Now retired.

Organizations
Institute of Chemical Engineers. Royal Society of Chemistry.

Education/Credentials
Chartered Chemist, Member of the Royal Society of Chemistry (C.Chem MRSC). Msc Sheffield.

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