Category: Pure Sciences

SP2 Hybridization

Science > Chemistry > Physical Chemistry > Nature of Chemical Bond > sp2 Hybridization Mixing of one ‘s’ orbital and two ‘p’ – orbitals of nearly same energy forming set of trigonally arranged three identical orbitals of equal energy is known as sp2 hybridization. Geometry sp2 Hybridization: The hybrid orbitals are arranged around the central atom in a […]

Physics

Law of Radioactive Decay

In this article, we shall study the concept of radioactive decay, decay constant, and half life of radioactive substance. Transformation of radioactive element into another element (radioactive or non-radioactive) is known as radioactive decay or disintegration. In radioactive decay, the nucleus of a radioactive element called parent undergoes a spontaneous change accompanied by the emission […]

Calculus

Applications of Derivatives Radius of Curvature

Post author By Hemant More
Post date June 8, 2022
No Comments on Applications of Derivatives Radius of Curvature

Radius of curvature of the curve y = f(x) is given by Example 01: Find the radius of curvature of the curve y = x3 at (2, 8) Solution: Equation of curve is y = x3 ………. (1) Differentiating both sides w.r.t. x (dy/dx) = 3×2 ………………. (2) (dy/dx) at P(2, 8) = 3(2)2 = […]

Organic Chemistry

Reactions of Alkanes

In last article, we studied preparations of alkenes. In this article, we shall study reactions of alkanes. Reactivity of Alkanes (Less Reactivity): Alkanes are saturated hydrocarbons. They do not contain any functional group. Hence they are less reactive. Under normal conditions, they are not acted upon by concentrated acids, alkalies, oxidising agents etc. Branched-chain alkanes […]

Organic Chemistry

Preparations of Alkanes

In the last article, we have seen what is meant by alkanes, their classification, and nomenclature. In this article we shall study preparations of alkanes by different methods. From Unsaturated Hydrocarbons: Preparations of Alkanes From Alkenes: Alkanes are obtained by passing the mixture of alkenes and hydrogen over Raney nickel (Ni), or platinum(Pt) or palladium […]

Physics

Reference Frames

Science > Physics > Newton’s Laws of Motion > Reference Frames Before studying Newton’s laws of motion, we shall understand a very important concept of reference frames in this article. Motion is a Relative Concept: Motion is always with respect to the observer. Consider a person A is standing in a train moving in the […]

Tags Inertial reference frame, Motion, Newton's Laws of Motion, Non-inertial reference frame, Physics, Pseudo force, Real force, Reference frame

Physics

Numerical Problems on Viscosity

Post author By Hemant More
Post date May 12, 2022
No Comments on Numerical Problems on Viscosity

In this article we shall study to solve problems on calculation of viscous force, coefficient of viscosity, and velocity gradient. Example 01: Calculate the horizontal force required to move a metal plate of area 2 x 10-2 m2 with a velocity of 4.5 x 10-2 m s-1 when it rests on a layer of oil […]

Tags Coefficient viscosity, Flow, Newton's law of viscosity, poise, Stoke's law, stokes, Streamline flow, Terminal velocity, Turbulent flow, Viscosity

Physics

Numerical Problems on Levers

Post author By Hemant More
Post date April 26, 2022
1 Comment on Numerical Problems on Levers

Science > Physics > Simple Machines > Numerical Problems on Levers Example 01: In a lever, the effort arm is 60 cm and load arm is 40 cm. Find its mechanical advantage: Given: Effort arm = E.A. = 60 cm, Load arm = L.A. = 40 cm To Find: Mechanical advantage = M.A. =? Solution: […]

Physics

Simple Machines

Science > Physics > Simple Machines > Simple Machines A simple machine is a mechanical device that makes our life easier. If a force is applied at one point, the simple machine transmits it to another point with a convenient change of magnitude and direction. In this article we shall study the terminology associated with […]

Physics

Motion in a Straight Line Fill in the Blanks Questions

Post author By Hemant More
Post date February 28, 2022
No Comments on Motion in a Straight Line Fill in the Blanks Questions

Science > Physics > Motion in a Straight Line >Motion in a Straight Line Fill in the Blanks Questions Fill in the Blanks If a body changes its position with respect to its surroundings, the body is said to be in ………….. If a body changes its position with respect to its surroundings, the body […]