Question

A cold soft drink is kept on the balance. When the cap is open, then the weight:

• A. increases
• B. decreases
• C. first increases then decreases
• D. remains same

Answer 1

Answer: (C)

first increases then decreases

$P=F\times A$

We know the cold drinks are packed with high pressure so as we let go the cap pressure releases pushing the bottle downwards and hence proportionally force on the balance as well therefore initially the force or weight increases and then decreases.