what's a heavier? A kilogram of steel or a kilogram of feathers

[SubDaWoofer]

wa'ah

[Ad Bot]

[Mr Man]

A kilogram of lead, duh

[Dragonoid.Slayer]

kilogram of steel

[Path]

A kilo of coco

[Clone v.117]

Two kilograms of anti-matter.

[Planr]

but steel is heavier than feathers

a baby elephant is heavier than a baby bird

[Path]

a baby elephant is heavier than a baby bird

ten dead babies are heavier than nine

[Planr]

ten dead babies are heavier than nine

[Clownfish]

well they're both a kilogram but steel is heavier than feathers

[Tudoreleu]

Jokes aside, a kilogram of steel (if accounted for by its mass and not its weight) really does weigh more than a kilogram of feathers (if accounted for by its mass and not its weight).

Weighing =/= having mass.

And this popular trick of saying they weigh the same bothers me to no end; because the premices of the trick does not differentiates weighing and having masss; The trick says kilograms, which is what is used to measure mass; when it will try to equate forces (measured in Newtons).
You would think it does not matter, but it does.
Say you take an amount of steel by measuring how difficult it is to move it. You attach it to a spring horizontally and measure the period taken for the spring to move back and forth the steel. Same for taking an amount of feathers.
Now, you put them both vertically, and weigh them: you measure the forces they apply to some device. Now the forces are:
1) the gravitation of earth,

and
2) Archimedes' principle: both the steel and feathers take some place in our atmosphere, and thus are subject to forces equal to the mass of the air they displace.

The feathers are less dense than steel, and take more space. And are more subject to Archimedes' principle. Thus they will experience less force towards earth, and they will weigh less.
How much less? This less:
( (1 kg) / (density of feathers) - (1 kg) / (density of steel) ) * (density of air)
or 31.72g, which is not even negligible.
So this trick is outright untrue and dishonest(saying kg instead of Newtons), and the shame should 100% be on the trickster.
disclaimer:found this on reddit

???????????????????????????????????????????????????????????????????????????????????????

since when the forget is that how you calculate something's weight (G)?

it's... it's G = m * g. g is constant on the location, generally 9.81 N/kg. m is the same because we've already established that. so the G's are also the same?

[Clownfish]

this and why the forget does air density matter

[Niff]

Steel feathers

[Rad]

why is this 4 pages

[Foxscotch]

you'd be better off doing this with some measurement nobody uses
like ask whether a kiloliter of steel or feathers is heavier
and people will probably assume it's the trick question and say they're the same
but they would be wrong, so it's like a double trick question

[communistsquared]

this and why the forget does air density matter

uhh. well, if air is hella dense then it could make breathing harder which would make weights feel heavier or something?...