any two experiment of NCERT of class 9th of Physics ch-1,2(how will answer i will make him brainlist)
Answers
Most people consider science as a fascinating subject for quiet a few people and consider it as not among their favourites owing to the fact that science has been taught to them in a monotonous manner with the bright and attractive side of the subject being not shown to them.
This is one of the major reasons why the schooling curriculum focuses on fostering the liking for science among students by implementing projects of different types on subjects which could be done even from your home using articles available in the households. Here are some science experiments for class IX students that includes topics from Chemistry, Biology and Physics which would be helpful for students to grasp concepts in a simple and lucid manner.
Here are some examples of Science Experiments:

Wave Particle Duality of Light
In this experiment, we would be discussing about quantum interference and its relation with wave particle duality since it has been a subject of fascination for science enthusiasts worldwide. Thus you would be able to see the quantum mechanics in action.

Acid Test – How to spot minerals separately
People would have different answers for the same as they would point out factors like shape color or size of the minerals but sugh statements are not factual. Hence we have to resort to one of the correct ways to figure this out and that way is none other than the acid test.

Elastic Collision of Equal Masses Using Pool
Pool is one of the classic examples of how physics would come into action. During the game of pool the momentum(product of mass and velocity) of ball should be conserved after every collision. This would imply that the total momentum of collision both before and after should be the exact same.

How to make a Fireproof balloon
Most children would be curious to learn ways about how to make their balloons fireproof as it is loosely connected to the science physics . If we try to bring a balloon close to fire, it would explode instantly.Let us try to prevent this from happening using the below