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Chayanika Guin

Nov 16, 2013



Sabu

Jun 24, 2014



Nidhi Maithani

Dec 3, 2014



Manikanth

May 17, 2014

#### Why should curd and sour substances not be kept in brass and copper vessels?



sour substances are cidic in nature,i.e, they have acids in them. So, when they are kept in brass or copper vessels, they react...

Unmukt

Jan 19, 2014

#### uses of convex lens in daily life.,.



Some uses of convex lens are:

Anuj A

Mar 1, 2015



Sudharsan s

May 7, 2015

#### What is the difference between resistance and resistivity of a conducter? Please Explain?



1.  Resistance of a conductor is the obstruction offered by the conductor in the flow of current throu...

Ayushman

Feb 26, 2014

#### write the similarities between dobereiner's triads and newland's law of octaves?write the change in modern periodic table as we go from left to right and top to bottom in context to -(1)valency electrons(2)valency(3)electronegativity (4)metallic character(5)electron affinity(6)atomic sizealso explain how?



Uses:
�i) � Atomic weights of elements were determined with the help of periodic table
Atomic weight = Valency ´ Equivalent weight = Group number ´ Equivalent weight.
...

Nikhil Sikka

Jun 13, 2014



Prateek Jain

Jul 9, 2015

#### I want all the formulas used in chapter electricity



The formulas used in class X are-
1- I,current=Q,charge/T,time
2- V,potential differnce=W,work done/Q,charge
3-V,potential difference=I,cureent*R,resistance
4-Resisitivity=(R,resista...

Chayanika Guin

Nov 16, 2013



Sabu

Jun 24, 2014



Nidhi Maithani

Dec 3, 2014



Manikanth

May 17, 2014

#### Why should curd and sour substances not be kept in brass and copper vessels?



sour substances are cidic in nature,i.e, they have acids in them. So, when they are kept in brass or copper vessels, they react...

Unmukt

Jan 19, 2014

#### uses of convex lens in daily life.,.



Some uses of convex lens are:

Anuj A

Mar 1, 2015



Sudharsan s

May 7, 2015

#### What is the difference between resistance and resistivity of a conducter? Please Explain?



1.  Resistance of a conductor is the obstruction offered by the conductor in the flow of current throu...

Ayushman

Feb 26, 2014

#### write the similarities between dobereiner's triads and newland's law of octaves?write the change in modern periodic table as we go from left to right and top to bottom in context to -(1)valency electrons(2)valency(3)electronegativity (4)metallic character(5)electron affinity(6)atomic sizealso explain how?



Uses:
�i) � Atomic weights of elements were determined with the help of periodic table
Atomic weight = Valency ´ Equivalent weight = Group number ´ Equivalent weight.
...

Nikhil Sikka

Jun 13, 2014



Prateek Jain

Jul 9, 2015

#### I want all the formulas used in chapter electricity



The formulas used in class X are-
1- I,current=Q,charge/T,time
2- V,potential differnce=W,work done/Q,charge
3-V,potential difference=I,cureent*R,resistance
4-Resisitivity=(R,resista...

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