Question

is the same mass in a balloon blown up the same mass as a balloon flat?

Answer 1

give me a sec

Answer 2

@1996nightrider

Answer 3

here is my song

Answer 4

Object "Balloon with helium" has more mass than object "balloon w/o helium". The weight is what you measure then you put an object on the weights, correct? Then what you measure is this:

Weight = mg - rho * V * g

where rho * V * g is buoyancy force. rho density of air., V is volume.

Apparently in case of helium filled balloon buoyancy is greater than gravity and therefore Weight is negative and balloon flies away.

In the way the problem is posed the answer "Helium filled balloon has less weight" is legit correct answer if experiment is made in the air, which is "normal" conditions isn't it?

If your problem has condition that experiment is made in vacuum - then different story - no air so no buoyancy and "helium filled balloon has more weight than empty balloon"

Answer 5

no the mass of both balloons are different

Answer 6

the filled balloon will be heaver or lighter then the flat balloon

Answer 7

will this help