From: Emanuel Berg <moasenwood@zoho.eu>
To: zsh-workers@zsh.org
Subject: Re: zsh functions, bicycle tire and gas law (PV = nRT)
Date: Fri, 24 Apr 2020 23:26:01 +0200 [thread overview]
Message-ID: <87tv18h8ye.fsf@ebih.ebihd> (raw)
In-Reply-To: <87v9loiyd8.fsf@ebih.ebihd>
Some interesting data from this program [1], especially
the meagre improvements from switching from 23 to 25 -
not even 3% more air!
# MTB twenty-niner, 57-622 65 PSI
# $ bike-tire-air 57 622 65
# $ V = 544 cm3
# $ 0.100902 moles of air gas
# road bike, maximum PSI, 23-622 145 PSI
# $ bike-tire-air 23 622 145
# $ V = 65 cm3
# $ 0.026895 moles of air gas
# (/ 0.026895 0.100902) ; 26% of MTB tire air
# road bike, realistic PSI for ~80 kg rider, 23-622 115 PSI
# $ bike-tire-air 23 622 115
# V = 65 cm3
# 0.021330 moles of air gas
# (/ 0.021330 0.100902) ; 21%
# road bike: is it worth upgrading from 23 mm to 25 mm?
# $ bike-tire-air 23 622 115
# V = 65 cm3
# 0.021330 moles of air gas
# $ bike-tire-air 25 622 100
# V = 77 cm3
# 0.021972 moles of air gas
# (- 100 (* 100 (/ 0.021330 0.021972))) ; 2.9% improvement! :O
# budget tires
# $ bike-tire-air 28 622 85
# V = 97 cm3
# 0.023528 moles of air gas
# (/ 0.023528 0.100902) ; 23%
[1] https://dataswamp.org/~incal/conf/.zsh/air
--
underground experts united
http://user.it.uu.se/~embe8573
https://dataswamp.org/~incal
prev parent reply other threads:[~2020-04-24 21:26 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-24 17:31 Emanuel Berg
2020-04-24 21:26 ` Emanuel Berg [this message]
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