Wednesday 9 April 2014

Science Notes(which type of matter expands the most)


Is it solids?
Is it liquids?
Or is it gases?
The answer is gases.Why?
Gases, as they are already in random motion and fill the volume available, will expand much more readily, and much more than Solids and Liquids. A fully inflated balloon when heated will expand and probably 'Pop!' When gases are heated, the added energy makes them move even faster and thus expand. Gases tend to occupy whatever space is available.

Science Notes(ball and ring experiment)

Why is the metal ball able to pass through the metal ring after heating the ring?

When the ring is heated,it expands in size and the ball which is still the same size as before is able to pass through the expanded metal ring.

I had this question in my mind after watching and learning the ball and ring experiment.When you heat the ring,does it mean that the whole ring expands or just the hole on the middle that expands.My guess is that the whole ring expands as it cannot be the hole that only expands.If only the hole expands,then the proportionate of the hole to the whole ring is wrong.Also,when you heat up the ring,th whole ring gains heat and not only the ring.that is how I came to the conclusion tha when you heat up the ring,it is the whole ring that expands and not only the hole in the middle of the ring.

Scence Notes(bimetallic strip)

Today we learnt what is the bimetallic strip,how it works,its uses in a fire alarm and the household appliances that use the bimetallic strip.U may wonder what a bimetallic strip is.Well,a bimetallic strip is simply two strips of different metal stuck together.How does it work?It works by heating it and the metal that expands more will also bend more,hence being the outer strip of metal.How does it help in a fire alarm system?When the heat emitted by the fire heats up the bimetallic strip,the bimetallic strip will bend downwards,hence causing a close circuit so that electricity can flow through the closed circuit and can ring the bell to alert the people.You have not realise but bimetallic strip are all around us.Irons and refrigerators all use the bimetallic strip.

Wednesday 2 April 2014

Science Notes(what happens when you increase the size of the capillary tube)

What will happen if you increase the size of the capillary tube?

Scientific principles have the knack of explaining abnormal events that occur around us. A liquid, like water, ascending up a narrow tube naturally is not considered as a typical occurrence. Since, water and other liquids in general flows with the gravitational forces, it requires specific circumstances and physical effect to flow against the forces of gravity. This scientific phenomenon is called capillary action. The transportation of water from the roots to leaves of the tree happens due to the underlying principles of cohesion and transpiration.

Practical use of capillary action is evident in all forms of our daily lives. It makes performing our tasks efficiently and effectively.