Weight Loss - Physics

[justinbaker]

If I have a large tank of air, sitting on scales. Then I extract the air with a vacuuum pump?
Will the the scales show a lower weight?

[scruffy]

You don't mention a conveyor belt.

Can you confirm?

[HundredthIdiot]

Yes.

[illmonkey]

Is the vacuum still connected to the tank?

[evenflow]

Yes, molecules within the air have mass. A vacuum by definition is "empty", and therefore has no mass associated with it.

[OhDear!]

justinbaker said:

If I have a large tank of air, sitting on scales. Then I extract the air with a vacuuum pump?
Will the the scales show a lower weight?

Yes, but they'd have to be very sensitive. Air is very light but doesn't way nothing.
Where do you think atmospheric pressure comes from?

Rubbish question JB, disappointed in you 0/10.

[patmahe]

I'm assuming the air in the tank is compressed, I'm also assuming compressed air weighs more than non compressed air, so I'm assuming that when the air is taken out of the tank it would be lighter.

I'm also assuming someone will tell me all my assumptions are wrong and to stop saying assuming.

[mercemployee]

In my uneducated opinion, the dial would lower to below zero as the air is sucked out, but the difference between the position of the dial "with man on scales" and "without man on scales" would be the same.

Am I right?

[phumy]

OhDear! said:

justinbaker said:

If I have a large tank of air, sitting on scales. Then I extract the air with a vacuuum pump?
Will the the scales show a lower weight?

Yes, but they'd have to be very sensitive. Air is very light but doesn't way nothing.
Where do you think atmospheric pressure comes from?

Rubbish question JB, disappointed in you 0/10.

Rubbish answer too, 2/10 for poor english.

[quyen]

justinbaker said:

If I have a large tank of air, sitting on scales. Then I extract the air with a vacuuum pump?
Will the the scales show a lower weight?

Gas has mass so the answer is yes.

My 996C2 produces 269g of CO2 per km.

How many grams of CO2 does your TVR Tuscan produce?

[mat205125]

Yes.

[RobDickinson]

justinbaker said:

If I have a large tank of air, sitting on scales. Then I extract the air with a vacuuum pump?
Will the the scales show a lower weight?

I done that experiment when I was like 5 at junior school.

Get a balance/scale and put a baloon on each end, they should balance (and set them too) then inflate one ballon (with air) its heavier.

[HundredthIdiot]

RobDickinson said:

I done that experiment when I was like 5 at junior school.

Get a balance/scale and put a baloon on each end, they should balance (and set them too) then inflate one ballon (with air) its heavier.

Ah, but maybe the rubber gets heavier as it stretches...?