Instantaneous velocity: It is defined as the rate of change of position for a time interval which is very small almost zero. Beside Instantaneous velocity, average velocity is a way of defining how fast a body is moving. But average velocity is only the average of the velocity of body over a given time interval, Read more about Instantaneous Velocity and Speed[…]
Various representations are used to represented motion of any object like pictorial representation, graphs, and verbal representation etc. The branch of mechanics which studied the motion of an object is called kinematics. It describes the concept of motion with graphical representation of its basic term like displacement, velocity, speed, acceleration etc. And motion equation which Read more about Kinematic Equations for Uniformly Accelerated Motion[…]
In spite of our best efforts we could not find a fixed point with respect to which we should study absolute rest and absolute motion. So, the study of relative rest and relative motion assumes importance. Consider two cars A and B running parallel to each other on same road with same velocities. No doubt Read more about Relative Velocity[…]
V(t) = Vm sin ωt . . Where, . i(t) = Im sin ωt And P(t) = v(t) i(t) P(t) = Vm sin ωt Im sin ωt . Hence, average power is . .It is clear that if current or voltage waveform has a frequency of 50 Hz then power waveform has a frequency of Read more about Voltage Source across Resistor[…]
The diazonium salts have the general formula RN⁺₂X⁻ where R stands for an aryl group and X– ion may be Cl⁻, Br⁻, HSO⁻₄, BF⁻₄ etc. Primary aliphatic amines form highly unstable alkyldiazonium salts. Primary aromatic amines form arenediazonium salts which are stable for a short time in solution at low temperatures (273 – 278 K). Read more about Diazonium Salts[…]
V(t) = ωL Im cos ωt V(t) = XLIm cos ωt Where; XL = ωL; XL is known as inductance of circuit and has a unit of “ohm” V(t) = XLIm sin (ωt + 90⁰) And instantaneous power p(t) = v (t) * i(t) = Vm cos ωt Im sin ωt So average power is Read more about Voltage Source across Inductor[…]
1. Reduction of nitro compounds Reactants: Nitro compounds Reagent: H2 in the presence of finely divided nickel, palladium or platinum Product: Amines Reactants: Nitro compounds Reagent: Metals in acidic medium. Reduction with iron scrap and hydrochloric acid is preferred because FeCl2 formed gets hydrolysed to release hydrochloric acid during the reaction. Thus, only a small Read more about Preparation of Amines[…]
If the particle moves in the circle with a uniform speed, we call it a uniform circular motion. In this case, dv/dt = 0 and equation gives . Thus, the acceleration of the particle is in the direction of , that is, towards the centre. The magnitude of the acceleration is α = ω²r . Read more about Uniform Circular Motion[…]
Definition: ⇒ The particles in nucleus of a cell, responsible for heredity, are called chromosomes which are made up of proteins and nucleic acids. ⇒ Nucleic acids are long chain polymers of nucleotides, so they are also called polynucleotides. ⇒ Examples: Deoxyribonucleic acid (DNA) & Ribonucleic acid (RNA). Chemical Composition of Nucleic Acids: ⇒ Each Read more about Nucleic Acids[…]
When light travels from an optically denser medium to a rarer medium at the interface, it is partly reflected back in to the same medium and partly refracted to the second medium. This reflection is called the internal reflection. When a ray of light enters from a denser medium to a rarer medium. It bends Read more about Total Internal Reflection[…]