What does spring balance measure : Mass or Weight?

Why does a spring balance show wrong measure after long use?

Why do spring balances show wrong reading after long use ?

What is balanced force?

The two ends of a spring balance are pulled each by a force of 10 kg wt. What will be the reading of the balance?

What does PMMA stand for?

What does SBR stand for?

What is the measure of each interior angle?

What is the measure of each exterior angle?

What is corrosion? Give two measures for the prevention of corrosions of metals.