Rolling Friction Whenever the surface of an object slides over another, each object experiences a contact force. Which always opposes the relative motion between the surfaces, this contact force is called as frictional force. This force acts tangentially to the interface of two bodies. What is Rolling Friction? For a moving solid body, there are Read more about Rolling Friction[…]
Equipotential Surfaces The electric field can be characterised by using the vector quantity, electric intensity and also by using the scalar quantity, the potential. By using electric potential and potential energy, instead of electric intensity and electric force, many difficulties arising due to vector nature of electric field can be avoided. The flow of charge Read more about Equipotential Surfaces[…]
Entropy Thermodynamics is the study of Energy, Equilibrium and Entropy The first law of thermodynamics was stated in terms of cycles first and it was shown that the cyclic integral of heat is equal to the cyclic integral of work. When the first law was applied for thermodynamic processes, the existence of a property, the Read more about Entropy[…]
Enthalpy When a process undergoes at constant pressure, the heat observed/ released is equal to the change in Enthalpy. It is sometimes referred as heat content. Enthalpy is the sum of the Internal energy and the product of the Pressure and Volume. Mathematically, Enthalpy (H) = U + PV Where, U = Internal Energy of Read more about Enthalpy[…]
Periodic Motion One complete repetition of the motion is called a cycle. The duration of each cycle is the period. Period is the duration of one cycle in a repeating event, while the frequency is the number of cycles per unit time. What is Periodic Motion? Any motion that repeats itself after regular intervals of Read more about Periodic Motion[…]
Planck’s Equation Planck’s constant is a number, it describes the size of the energy packets that are contained within light. These packets of energy are called photons. Planck’s constant is given the symbol h and the value of h is equal to 6.63 x 10-34⁻³⁴ J\se. What is Planck’s Equation? While Planck’s constant can now be Read more about Planck’s Equation[…]
Pressure Have you ever observed why the nails end with a sharp point, while sipping Cool drink from a straw, have you noticed that you actually suck the air out of the straw? Why and how does this happen? To answer all this questions lies in the concept of pressure. While you sip the Cool Read more about Pressure[…]
Viscosity When you pour a bottle of water on someone’s head, it flows through their hair and over their face. But when you pour honey on someone’s head, it takes its own sweet time in flowing through that person’s head. This is because of the property of the fluids called viscosity. Honey is thicker than Read more about Viscosity[…]
Uniformly Accelerated Motion Objects on the earth surface are accelerated towards the centre of the earth at a rate of 9.8 m/ sec². If we raise an object above the surface of the earth and then drop it and the object will start from rest, its velocity will be increased by 9.8 m/ sec². For Read more about Uniformly Accelerated Motion[…]
Beats Beats occur when two waves of nearby frequencies overlap and create a new resultant wave. A wave not only travels in space but it also propagates through time, so if the two waves can produce interference by overlapping in space they should also produce an interference pattern when they overlap in time, this phenomenon Read more about Beats[…]