Given :The given expression is $\frac{3y+4}{2-6y}=\frac{-2}{5}$.To do : We have to find the value of y.Solution : On cross multiplication, $\frac{3y+4}{2-6y}=\frac{-2}{5}$$(3y+4)5 = -2(2-6y)$$15y+20=-4+12y$$15y - 12y = -4-20$$3y = -24$$y= \frac{-24}{3}$$y = -8$Therefore, the value of y is $-8$.Read More

Given :The given number is 3.5.To do :We have to find the square root of the given number.Solution :The square root of 3.5 can be found by the long division method.Let us find the square root of 3.5 up to 2 decimals.Following are the Steps to find square root: First ... Read More

A black hole is a place where gravity pulls everything such that even light can not get out. The gravity is so strong because the matter has been squeezed into a tiny space. This would happen when a star is dying. Since no light can get out of it, they are invisible. ... Read More

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Momentum is the quantity of motion that a moving object has.  If an object is in motion then it has momentum. Momentum is defined as the product of the mass of a particle or body that is moving and its velocity. Mathematically,  momentum = Mass $ \times $ Velocity Momentum ... Read More

Given :A winner in the competition gets a prize of Rs 100 and a participant who does not win gets a prize of Rs 25. The total prize money distributed is Rs 3, 000.The total number of participants $= 63$.To find :We have to find the number of winners.Solution :Let ... Read More

When a candle melts, it converts to liquid form. It is a physical change. While burning it produces carbon dioxide, heat, and light. It is an irreversible change. Hence it is also a chemical change. This kind of chemical and physical changes are also occurring in liquefied petroleum gas which ... Read More

Ans-1. Option- (ii), Process - B is a chemical change.Ans-2. Option- (i), Process A is a Chemical change.

Given :The given expression is $(\frac{\sqrt{3}}{\sqrt{2}+1})^2 + (\frac{\sqrt{3}}{\sqrt{2}-1})^2 +(\frac{\sqrt{2}}{\sqrt{3}})^2 $.To do :We have to simplify the given expression.Solution :$(\frac{\sqrt{3}}{\sqrt{2}+1})^2 + (\frac{\sqrt{3}}{\sqrt{2}-1})^2 +(\frac{\sqrt{2}}{\sqrt{3}})^2 $We know that, $(\frac{a}{b})^2 = \frac{a^2}{b^2}$ and $\sqrt{a}^2 = a$.$\Rightarrow \frac{\sqrt{3}^2}{(\sqrt{2}+1)^2} + \frac{\sqrt{3}^2}{(\sqrt{2}-1)^2} +\frac{\sqrt{2}^2}{\sqrt{3}^2} $$\Rightarrow \frac{3}{\sqrt{2}^2 + 1^2 + 2.\sqrt{2}.1} + \frac{3}{\sqrt{2}^2 + 1^2 - 2.\sqrt{2}.1} + \frac{2}{3}$  ... Read More

A force is a push or pull of an object that causes it to change velocity (to accelerate). Whenever there is an interaction between two objects, there is a force exerted on each of the objects. The S.I unit of Force is Newton. The formula for force implies ... Read More