6 ms·

How many football fields of acceleration is this?

by expertentipp 3y ago

elboru 3y ago
At least 2
uberman 3y ago
about 0.11 football fields were required to reach 100km/h
- hedora 3y ago
  That seems high. What was the mass-to-energy conversion efficiency?
  - uberman 3y ago
    13.5 yards to go from 0 to 60mph seems high? How far did you anticipate it would take to reach that speed?
stuff4ben 3y ago
American or rest-of-the-world football?
- ozr 3y ago
  Football, not soccer, of course.
  - bborud 3y ago
    Oh, you mean handegg :-) https://br.ifunny.co/picture/ag-not-soccer-not-football-it-s-football-it-s-I1vUR5D5A https://br.ifunny.co/picture/ag-not-soccer-not-football-it-s...
- deleted 3y ago
  [deleted]
LanceH 3y ago
American or Canadian?
jaclaz 3y ago
Since it is 12.3 meters a more suitable unit of measure (for US journalists) should be the schoolbus.
perihelions 3y ago
It's *roughly* the gravitational acceleration at the surface of an Olympic-size swimming pool of electron-degenerate matter from a white dwarf star. Hope this helps! (Note: the swimming pool has collapsed under its own weight and is now a sphere).
- lucgommans 3y ago
  A white dwarf's density is apparently around 1e9 kg/m³. Olympic swimming pools at 50m*25m*2m * 1e9kg/m³ would have a weight of 2.5e12 kg. As a sphere, the radius is (solving: volume_of_sphere = 4/3×π×radius³) $ qalc 50m*25m*2m = 4/3*pi*x^3 (((50 * meter) * (25 * meter) * (2 * meter)) = ((4 / 3) * pi * (x^3))) = approx. (x = 8.4194515 m) Gravitational acceleration (for a point mass) is: the gravitational constant, multiplied by the mass, divided by the radius squared, and we want the result in Earth gravities: $ qalc G * 2.5e12kg / 8.4194515² m² to gee (newtonian_constant * ((2.5 * (10^12)) * kilogram)) / ((8.4194515^2) * (meter^2)) = approx. 0.24 gee You're only one order of magnitude off — if this is correct, which I am really not sure about! Sources: https://en.wikipedia.org/wiki/White_dwarf https://en.wikipedia.org/wiki/White_dwarf · https://en.wikipedia.org/wiki/Olympic-size_swimming_pool https://en.wikipedia.org/wiki/Olympic-size_swimming_pool · https://duckduckgo.com/?q=volume+of+a+sphere&ia=answer https://duckduckgo.com/?q=volume+of+a+sphere&ia=answer · https://www.wolframalpha.com/input?i=surface+gravity+calculator https://www.wolframalpha.com/input?i=surface+gravity+calcula... What I'm even less sure how to calculate is whether an 8-meter sphere can be that heavy. Uranium is ~2e4 kg/m³, but under its own gravity, things shrink until they reach black hole status (infinite smallness; perceived size coming from its event horizon). Basically I'd want to turn the above 1e9kg/m³ into an unknown, but what's the formula for mass given your specified radius and gravitational acceleration? TBD I'm really curious if this was just a few words strung together and it happened to come out to within one order of magnitude by pure coincidence, or if (how) you calculated this!
  - perihelions 3y ago
    - " You're only one order of magnitude off" Oh shit you're right. Root cause: I saw "3 g" and wrote "3 m/s^2".

How many football fields of acceleration is this?

elboru 3y ago

At least 2

uberman 3y ago

about 0.11 football fields were required to reach 100km/h

hedora 3y ago
That seems high. What was the mass-to-energy conversion efficiency?
- uberman 3y ago
  13.5 yards to go from 0 to 60mph seems high? How far did you anticipate it would take to reach that speed?

stuff4ben 3y ago

American or rest-of-the-world football?

ozr 3y ago
Football, not soccer, of course.
- bborud 3y ago
  Oh, you mean handegg :-) https://br.ifunny.co/picture/ag-not-soccer-not-football-it-s-football-it-s-I1vUR5D5A https://br.ifunny.co/picture/ag-not-soccer-not-football-it-s...
deleted 3y ago
[deleted]

LanceH 3y ago

American or Canadian?

jaclaz 3y ago

Since it is 12.3 meters a more suitable unit of measure (for US journalists) should be the schoolbus.

perihelions 3y ago

It's *roughly* the gravitational acceleration at the surface of an Olympic-size swimming pool of electron-degenerate matter from a white dwarf star. Hope this helps! (Note: the swimming pool has collapsed under its own weight and is now a sphere).

lucgommans 3y ago
A white dwarf's density is apparently around 1e9 kg/m³. Olympic swimming pools at 50m*25m*2m * 1e9kg/m³ would have a weight of 2.5e12 kg. As a sphere, the radius is (solving: volume_of_sphere = 4/3×π×radius³) $ qalc 50m*25m*2m = 4/3*pi*x^3 (((50 * meter) * (25 * meter) * (2 * meter)) = ((4 / 3) * pi * (x^3))) = approx. (x = 8.4194515 m) Gravitational acceleration (for a point mass) is: the gravitational constant, multiplied by the mass, divided by the radius squared, and we want the result in Earth gravities: $ qalc G * 2.5e12kg / 8.4194515² m² to gee (newtonian_constant * ((2.5 * (10^12)) * kilogram)) / ((8.4194515^2) * (meter^2)) = approx. 0.24 gee You're only one order of magnitude off — if this is correct, which I am really not sure about! Sources: https://en.wikipedia.org/wiki/White_dwarf https://en.wikipedia.org/wiki/White_dwarf · https://en.wikipedia.org/wiki/Olympic-size_swimming_pool https://en.wikipedia.org/wiki/Olympic-size_swimming_pool · https://duckduckgo.com/?q=volume+of+a+sphere&ia=answer https://duckduckgo.com/?q=volume+of+a+sphere&ia=answer · https://www.wolframalpha.com/input?i=surface+gravity+calculator https://www.wolframalpha.com/input?i=surface+gravity+calcula... What I'm even less sure how to calculate is whether an 8-meter sphere can be that heavy. Uranium is ~2e4 kg/m³, but under its own gravity, things shrink until they reach black hole status (infinite smallness; perceived size coming from its event horizon). Basically I'd want to turn the above 1e9kg/m³ into an unknown, but what's the formula for mass given your specified radius and gravitational acceleration? TBD I'm really curious if this was just a few words strung together and it happened to come out to within one order of magnitude by pure coincidence, or if (how) you calculated this!
- perihelions 3y ago
  - " You're only one order of magnitude off" Oh shit you're right. Root cause: I saw "3 g" and wrote "3 m/s^2".