55
69 rule (thelemmy.club)
top 7 comments
sorted by: hot top new old
[-] Zkuld@lemmy.world 8 points 2 days ago

on the other hand ln(67) = 4.20469... there certainly is some merit to the new meme number

[-] pcouy@lemmy.pierre-couy.fr 15 points 3 days ago

I never knew this fun fact ! I'll try to use it with my students, and see if I this gets me more attention when I give them the trick to compute powers of 2 in your head (2^10^ =~ 10^3^, which leads to ln(10^3^) =~ 10*ln(2) ).

For anyone wondering, the trick is : Powers of 2 below 10 are easy enough to remember or just compute in your head. So if you want to approximate 2^x^, write it as (2^10a^)(2^b^), with a=x//10 (integer division) and b=x%10 (modulo). b will be 9 or less, so 2^b^ is easy to compute, and 2^10*a^ = (2^10^)^a^ =~ 1000^a^ is also easy to compute.

For instance, 2^32^ = (2^30^)(2^2^). Since 2^30^=~1000^3^ ; and 2^2^=4, then 2^32^ =~ 4(1000)^3 = 4 billion. Once you get used to it, you'll be able to say that 2^64^ is approx 16 billion billions in no time ! :)

[-] emergencyfood@sh.itjust.works 9 points 3 days ago

'ln'? My brother in Euler, that's jist log. We aren't engineers [derogatory].

[-] WaterWaiver@aussie.zone 6 points 3 days ago

For extra joy #define ellen(A) ln(A)

[-] mkwt@lemmy.world 3 points 2 days ago

math.h provides log() for the natural logarithm, and log10() for the common logarithm. There is no ln() unless you write it yourself.

[-] WaterWaiver@aussie.zone 2 points 1 day ago* (last edited 1 day ago)

o.o I had completely forgotten this.

Next you're going to tell me that strlcpy() is not real. I will not believe you. I will choose not to believe you.

[-] far_university1990@reddthat.com 4 points 3 days ago
this post was submitted on 26 Jul 2026
55 points (88.7% liked)

Science Memes

20802 readers
1311 users here now

Welcome to c/science_memes @ Mander.xyz!

A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.



Rules

  1. Don't throw mud. Behave like an intellectual and remember the human.
  2. Keep it rooted (on topic).
  3. No spam.
  4. Infographics welcome, get schooled.


Research Committee

Other Mander Communities

Science and Research

Biology and Life Sciences

Physical Sciences

Humanities and Social Sciences

Practical and Applied Sciences

Memes

Miscellaneous

founded 3 years ago
MODERATORS