When the air inside the bottle was heated by the hot water, it expanded. As the air expands, some of the air was pushed into the balloon causing it to expand slightly. After the stove fire was put out, the air inside the bottle cooled and contracted, and the size of the balloon shrank.
What would have happened if the stove fire was not put out? Would the balloon have burst?
Important Questions on Changes Around Us
Observe the sidewalks shown. You can see that the concrete blocks have gaps at regular intervals. Can you think why?
When the air inside the bottle was heated by the hot water, it expanded. As the air expands, some of the air was pushed into the balloon causing it to expand slightly. After the stove fire was put out, the air inside the bottle cooled and contracted, and the size of the balloon shrank.
Was there any change in the colour of the balloon?
Which of the following is an example of both physical change and reversible change?
Is melting of ice-candy a reversible change?
What value of Urja was shown here?
