Question

How do the following changes differ from each other (a ) inflating a balloon ( b) bursting and inflated balloon

Answer 1

Answer:

a) it is a physical change

b) it is a chemical change

Explanation:

a) a physical change is a change that can be reversed like when you inflate a baloon , it is changed in its size but when you let out the air you are obtaining back your original substance.

b) a chemical is a change that can not be reversed like when you iflate a ballon and burst it you are not getting the original subsatance back.

Answer 2

Answer:Always when surface area of the object is lesser, the pressure is greater and when surface area of the object increases, the pressure decreases .

So when we use the pencil ,that balloon bursts but not in the case of when we use our fingers.

(Hint - pressure = thrust/area)

Explanation: