# Which weighs more ?

**URL:** <https://boards.straightdope.com/t/which-weighs-more/569196>\
**Category:** Factual Questions\
**Created:** [January 27, 2011, 4:39pm UTC](https://boards.straightdope.com/t/which-weighs-more/569196 "2011-01-27T16:39:48Z")\
**Posts on this page:** 7\
**Page:** 2

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**Author:** ![Hari\_Seldon](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/hari_seldon/32/5173_2.png) [@Hari\_Seldon](https://boards.straightdope.com/u/Hari_Seldon)\
**Post date:** [January 31, 2011, 12:39am UTC](https://boards.straightdope.com/t/which-weighs-more/569196/21 "2011-01-31T00:39:19Z")

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> [@Giles](#):
>
> There’s an assumption here that the two pints are the same volume. If it were a US pint of milk (473 ml) and an imperial pint of cream (568 ml). the pint of cream would weigh more.
> 
> If you ask the similar question, “Which weighs more, an ounce of gold or an ounce of lead?”, the answer is, “an ounce of gold”, because (conventionally) gold and lead are weighed with difference ounces, the troy ounce (31.1 g) and avoirdupois ounce (28.3 g) respectively.

Yes, but a pound of gold is only 12 Troy ounces and considerably less than a pound (16 av. ounces) of lead. For the same reason, a pound of feathers weighs more than a pound of gold.

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**Author:** ![Snarky\_Kong](https://avatars.discourse-cdn.com/v4/letter/s/a183cd/32.png) [@Snarky\_Kong](https://boards.straightdope.com/u/Snarky_Kong)\
**Post date:** [January 31, 2011, 1:06am UTC](https://boards.straightdope.com/t/which-weighs-more/569196/22 "2011-01-31T01:06:10Z")

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> [@spingears](#):
>
> Why do you ask?  
> You answered your own question!  
> Since cream floats to the top of milk, the milk must weigh more than the cream. QED!

Except density changes with temperature. Although apparently not enough to matter in this case.

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**Author:** ![Mosier](https://avatars.discourse-cdn.com/v4/letter/m/7ea924/32.png) [@Mosier](https://boards.straightdope.com/u/Mosier)\
**Post date:** [January 31, 2011, 6:00am UTC](https://boards.straightdope.com/t/which-weighs-more/569196/23 "2011-01-31T06:00:29Z")

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What weighs more? Jupiter or a brick?

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**Author:** ![Inner\_Stickler](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/inner_stickler/32/318_2.png) [@Inner\_Stickler](https://boards.straightdope.com/u/Inner_Stickler)\
**Post date:** [January 31, 2011, 6:09am UTC](https://boards.straightdope.com/t/which-weighs-more/569196/24 "2011-01-31T06:09:47Z")

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How big is the brick?

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**Author:** ![Derleth](https://avatars.discourse-cdn.com/v4/letter/d/b9e5f3/32.png) [@Derleth](https://boards.straightdope.com/u/Derleth)\
**Post date:** [January 31, 2011, 7:13am UTC](https://boards.straightdope.com/t/which-weighs-more/569196/25 "2011-01-31T07:13:13Z")

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> [@Inner\_Stickler](#):
>
> How big is the brick?

That depends… how long is a piece of string?

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**Author:** ![Inigo\_Montoya](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/inigo_montoya/32/124_2.png) [@Inigo\_Montoya](https://boards.straightdope.com/u/Inigo_Montoya)\
**Post date:** [February 1, 2011, 5:03pm UTC](https://boards.straightdope.com/t/which-weighs-more/569196/26 "2011-02-01T17:03:18Z")

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> [@Inner\_Stickler](#):
>
> How big is the brick?

And how close is it to a black hole.

And is the gravitational pull of the black hole working against the friction asserted on the brick by a special treadmill rolling away from the black hole?

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**Author:** ![ChordedZither](https://avatars.discourse-cdn.com/v4/letter/c/e9c0ed/32.png) [@ChordedZither](https://boards.straightdope.com/u/ChordedZither)\
**Post date:** [February 1, 2011, 5:46pm UTC](https://boards.straightdope.com/t/which-weighs-more/569196/27 "2011-02-01T17:46:08Z")

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> [@Mosier](#):
>
> What weighs more? Jupiter or a brick?

If the brick is in orbit around Jupiter, they weigh the same relative to one another. Jupiter pulls on the brick just as much as the brick pulls on Jupiter.

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