Science World

As its name implies ,Mother board is the board on which all the components of computer are attached i.e The three Basic systems that are attached on mother board are:

(i)Processing Units i.e CPU,micro processors ,etc

(ii)Memory Units: i.e  RAM, ROM, Hard disk and other disk drives.

(iii)Power System,which provide power connections to all the components of the computer through motherboard etc.

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1:  IPICCY

Second generation of computer

First Generation Computers.

(i) Napier bones:

Construction:

Computers History:

(i)First Generation of Computer

(ii)Second Generation of Computer

(iii)Third Generation of Computer

(iv)Fourth Generation of Computer

(v)Fifth Generation of Computer.

 

First calculating device(Abacus):

Introduction and Importance:

Centrifugal force:

Centripetal Force has come from Latin words (centrum means center and fugree means to flee) it is an outward seeking force.

Major concepts:

                            What is centripetal force:                                     

Definition:

"The force that tends to move a body in circle is called centripetal force.

The center seeking force is called Centripetal force"

Explanation:

Do you want to make a secret letter for someone,a map,a secret message,a secret picture,and so on.
So the question is how to write an invisible message,no doubt you will need an invisible ink that is invisible but appears when needed,I will tell you  how make one

Method 1:

Things you will need:

1. Some lemons.
2.A paint brush.
3.A bowl.
4 a paper to write

What to do:

1 Take the bowl and Squeeze the lemon juice in it.
2.Take the brush and dip it in the lemon juice.
3. Write with the lemon juice on the paper.
4.wait for it to dry and disappear
5.Now,when you want to the message to reappear heat it in front of a bulb or candle flame.

Viola! Your secret is ready.!!!


                     

Things You Will Need:

1.an iron nail
2.about 1 to 1 1/2 feet long copper wire
3. A new battery(The higher voltage the better it is)
4.Some iron made things e.g. paper clips.


What to do:


1.Take the nail and wrap the wire around the nail but leaving some of the part at the end.
The more you wrap the better it will be
2.Now peel the end of the wire at the both ends
4.Now place the two ends at the terminals of the battery.
5.Now place the paper clips at the end tip of the nail you will see that they will stick.


                               Enjoy your own electromagnet







                                                     

                               

Experiment 1:

What you will need:

1.Balloon
2.Your hair or silk or warm  cloth
3.place near wall

What to do:

1.Take the balloon and rub it with your hair as quickly as possible.
2.make it closer to the wall
3.you will see that it sticks with the wall.

How it works:

*When you rub the balloon with your hair it produces static charge in the balloon which is a negative and when it get closer to the wall it sticks because the wall have + charge and the balloon- the two opposite charge attract each other resulting the balloon to stick.
For best results try on a cold day with less humidity.

Experiment no.2

What you need:

1.A plastic scale(or comb).
2.A piece of paper.
3.A scissor .

What to do:

1.Take the piece of paper and  tear in into small pieces with the scissor.
2.Place the small pieces of paper on a surface.
3.Now rub your scale with your hair for  10 to 15 sec.
4.Now take it closer to the pieces of paper on the surface.

You will see that the pager is trying to stick with the scale .Is it MagiC !!, but The answer is no.

What happened:

*When you rub the scale with your hair it produces static charge in the balloon which is a negative and when it get closer to the piece of paper it sticks because the paper  have + charge and the balloon- the two opposite charge attract each other resulting the balloon to stick.

Now you know that Opposite charges always Attract .

Things you will need:

1. Baking soda
2.A plastic bottle(any)
3.Balloon
4.two funnels
5.vinegar

What to do:

1.Take the bottle and fill it 1/3 of vinegar with one funnel.
2.Now with the help of another funnel put 1/2 of balloon fill with baking soda.
3.Now put the balloon on the top  the bottle and let the baking soda go inside the bottle and mix with  the vinegar.

(Now bubbles will form and your balloon will start to inflate.)

4.When it is filled tie the balloon's mouth with the string.

Enjoy your balloon.

What happened:

When baking soda is mixed with the vinegar ,the reaction produces a gas (as by product) which fills in the balloon.







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Things you will need:

1.Half cup of craft glue
2.Some food coloring(any color).
3. Warm water.
4. 1 spoon full of borax powder.
5.Jar for prepration.

What to do:

1.Take one jar and mix borax powder with 1 cup
warm water.
2.Now take the second jar and mix 1/2 cup of warm water with 1/2 cup of glue.
3.Now add food colouring to this.
4.Now mix the two jars togather.
5.Let it set for few minutes.

Enjoy, Your own made slime is ready








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Things you will need:

1. A penny
2.Lemon
3.Zinc nail(you can find it on your local hardware store)
4.Copper wires(for connection)
5. A knife(optional)

What to do :

1.Take the lemon and make a cut  on one side
2. now take the zinc nail and poke it on the other              side of the lemon.
3.Connect the wires, one with the  penny and one with the iron nail.
4.connect the two wires to a low voltage device to power it.
Enjoy Free electricity

Remember:

You can make this battery work better if,
*you can use a bigger lemon
*use a zinc plate instead of nail for larger surface area
*Join two or more then two lemons to get better voltage for your battery.






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Things you will need:

2#Some Baking soda.

3#vinegar

4#Some dish washing soap.

5#Some food coloring (red or yellow will be better).

6# Card board (Optional)

What to do now:

Now make volcano live,

What Is Happening:

Try yourself,

Will your volcano work better if: 

* Some thing is more added to this to make this lava real.

*Does the volcano erupts faster if the shape of volcano is changed.

* By increasing the amount of substances and the size of volcano.



                                                               

                                                      Happy playing with volcano

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                          Build a Hover Craft From Balloon

Things You Will Need:

What To Do Now:

What Is Happening:

Try yourself:

Think,