What's a piece of esoteric knowledge you have? (lemm.ee)

submitted 4 months ago by Irelephant@lemm.ee to c/asklemmy@lemmy.ml

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[-] hbar@lemmy.ml 4 points 4 months ago

Mammals generally get 1.5 billion heart beats in their lifetime regardless of size.

[-] pdqcp@lemmy.dbzer0.com 2 points 4 months ago

See, mega corps are simply mimicking nature by implementing planned obsolescence

[-] HiddenLayer555@lemmy.ml 1 points 4 months ago

So is cardio shortening your life?

[-] hbar@lemmy.ml 2 points 4 months ago

I don't think so, these numbers are population averages and the relationship probably doesn't apply at the individual level. Also humans don't tend to follow this rule as closely due to things like medicine.

[-] saigot@lemmy.ca 1 points 4 months ago* (last edited 4 months ago)

And they all (above 3Kg) pee on average for 21 seconds.

[-] captain_aggravated@sh.itjust.works 4 points 4 months ago

From an old edition of the Pilot's Handbook of Aeronautical Knowledge:

An airplane's tire will hydroplane at a speed in knots equal to 9 times the square root of the tire pressure in PSI. So if your tires are inflated to 36 PSI, sq.rt 36 = 6 * 9 = 54 knots. If there is standing water on the runway, you will have no braking authority or steering control from the wheels, you will have to maintain control of the aircraft with the flight controls, and you cannot rely on short field stopping figures from the POH if it requires applying brakes above 54 knots.

I got that out of the 2003 edition; I don't know if it's in the current issue.

[-] theywilleatthestars@lemmy.world 4 points 4 months ago

Everything you learn from being active on Tumblr from late 2012 to now

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this post was submitted on 19 May 2025

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