Answer:

Explanation:
The volume of the balloon can be find compared the force in each cases so:
reduce 25% from 74kg

So the net force uproad on the balloon is

Now the density of the both gases air and helium are different however the volume is the same change offcorss the mass so:






They are incline hope this helps!
Answer:
It includes earthwork, trenching, wall shafts, tunneling and underground
Explanation:
Answer:
a. 250kg I think it's the right answer. hope it helps:)
Answer:what is the question exactly
Explanation: