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What Polymer mean?

Polymers are materials that have long and repeated units of the molecules. Depending on the type of molecules and how... View Article

The relation between speed, distance and time is given as Speed = distance/time Distance is measured in metres and time... View Article

The angles are either measured in degrees or radians. The relationship between radians and degrees is that π radian is... View Article

If a body executes rotational motion, the equations of motions are written as ω = ω0 + αt θ =... View Article

The ionic bonds are stronger than the covalent bonds. The electronegativity between the two elements is much stronger in the... View Article

The formula for least count of a vernier caliper is given by the formula Least count of vernier caliper =... View Article

The first law thermodynamics is also called the law of conservation of energy. According to the first law of thermodynamics,... View Article

In a chemical reaction (oxidation reaction and reduction reaction) if there is a change in the oxidation number then it... View Article

Which of the following is a neutral oxide? SrO Al2O3 CO2 CO Answer : (d) CO Reason: Carbon monoxide dissolves... View Article

Alkalis are bases that can be dissolved in water. Few examples of alkalis are potassium hydroxide, sodium hydroxide etc. The... View Article

The pressure is kept constant in Charles law. According to Charles law, the volume of the gas is proportional to... View Article

The temperature coefficient of copper is 0.393 percentage per degree celsius. In other words, if the temperature increases by 10C... View Article

We cannot truly say Aluminium is a bad conductor because firstly it is a metal compound and secondly it contains... View Article

(1) (½) √(sec x + 1) (2) √(sec x + 1) (3) -(½) √(sec x + 1) (4) -√(sec x... View Article

(1) -2 (2) 2 (3) 0 (4) none of these Solution: Given y = cos (sin x2) dy/dx = -sin... View Article

(1) cos (1/x) + 2x sin (1/x) (2) 2x sin (1/x) – cos (1/x) (3) cos (1/x) – 2x sin... View Article

(1) -2x(1-x2)sin (1-x2)2 (2) -4x(1-x2)sin (1-x2)2 (3) 4x(1-x2)sin (1-x2)2 (4) none of these Solution: Let y = cos (1-x2)2 dy/dx... View Article

(1) xex (2 sin x + x sin x + x cos x) (2) xex (2 sin x + x... View Article

(1) (1/y)(dy/dx) = 1/x + cot x (2) dy/dx = 1/x + cot x (3) y(dy/dx) = 1/x – cot... View Article

(1) (a-z)2 (2) -(z-a)2 (3) (z+a)2 (4) -(z+a)2 Solution: Given y = 1/(a-z) ay-yz = 1 yz = ay-1 z... View Article