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MATHS TALENT TEST SCORES RELEASED OVERALLS

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THE BLACK HOLE

 

A region is an object with such powerful gravity that nothing can shake it, including light.

The black hole's mass is concentrated during a point of just about infinite density.

this is nothing but singularity. At the singularity, gravity is almost infinitely strong.
it crushes normal space-time out of existence. As the distance from the singularity increases, its gravitational influence reduce.

At a particular distance, which depends on the singularity's mass, the speed needed to flee from the region equals the speed of sunshine.

This distance marks the black hole 'horizon', which is like its surface.

Anything that passes through the surface is trapped inside the black hole. Black holes are available several varieties, counting on mass.

black holes are formed due to the collapse of large stars at the end of their life cycle.

Does OUR SUN BECOME A BLACK HOLE?

no, why means read the following data carefully.


Our Sun is really too small to finish up as a region. our sun does not contain enough matter to exert that
kind of gravitational force on itself. if the sun becomes a black hole, it has to be more than 10 times greater mass.


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ALKANES AND ALKENES,ALKYNES

ALKANES: these are also called paraffin. alkanes are saturated hydrocarbons. the formula of alkanes (CnH2n+2). when the H atom is removed from the alkane then it is replaced by the name of alkyl. the formula for alkyl is (Cn H2n+1). the carbon atom in it shows the sp3 hybridization. the bond length is equal to 1.54°A. ALKENES: these are also called as olefins means form oil products. it possess a double bond between them. the formula is (CnH2n). the carbon atom in it shows the sp2 hybridization. the bond length is equal to 1.34°A. ALKYNES: these are also called as acetylenes. the formula for this is (Cn H2n-2). the carbon atom in it possesses a triple bond and also shows the linear shape means it is in an sp hybridization. the bond length is equal to 1.20°A.
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THE HISTORY OF PERIODIC TABLE

The periodic table is invented due to avoid confusion while searching and locate the elements. at that time chemists are started to frame ways to group these elements and compounds on the basis of their physical and chemical states. at the beginning of the 18 th century, a scientist called joseph Louis stated that the hydrogen atom is a building material and atoms of all other elements are simply due to a combination of a number of hydrogen atoms. and also considering some examples the atomic weight of hydrogen is taken as ONE. DOBEREINER'S TRIAD THEORY: dobereiner's he was a German man. he was tried to prove the relationship between elements of their properties and atomic weights. he stated that the arrange the three elements are in ascending order which has similar properties with the help of atomic weights. and the middle element is the average of the first and third elements. this theory is called the law of triads. limitations: this law failed for low mass and very high ma...
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