how many pounds of helium does it take to lift 150 pounds?

Answer 1

RickB above is correct.

Answer 2

We don't have enough information to solve this problem. I guess we could try to google some things but what exactly do you consider a standard party balloon, etc. You could do a really easy experiment to find out though. Get a spring scale, sort of like what they use to weigh fish. Hang it off a rod or something and then tare it. Then tie a balloon to the hook on the scale. Record how many pounds it reads... This is how much upward force one balloon will produce. 150 divided by this number will equal how many balloons you need to equal his weight. Technically if that person just jumps or something he should keep going up with that many balloons.

Answer 3

Air is about 7 times as heavy as helium. To lift "x" pounds of payload, plus the "h" pounds of helium itself, you'd need enough helium to displace "x + h" pounds of air. That is:

7h = x + h
h = x/6

So, to lift 150 lbs of payload, you'd need about 150/6 = 25 lbs of helium.

Answer 4

0 pounds