In the 18th century Daniel Bernoulli noticed that fluids flow faster when forced through constrictions. We usually come across these kinds of phenomenon when we observe and compare rapids and meandering rivers. Bernoulli reasoned that when a particular energy increases in a system the rest of the forms of energy must decrease. To understand this principle the best Read more about Bernoulli’s Principle[…]
The Work Energy Theorem is the Idea that energy and work can be directly exchanged for one another. For example, if you do three joules of work to get a bowling ball moving, it is now moving with three joules of kinetic energy. According to the principle, work done by a force in displacing a Read more about Work Energy Theorem[…]
Newton’s first law explains what happens to an object when no force acts on it, it either remains at rest or moves in a straight line with constant speed. Newton’s Second Law answers the question of what happens to an object when one or more forces act on it. Newton’s second law of motion establishes Read more about Newton’s Second Law of Motion[…]
Before 1600 century, it was believed that the natural state of the matter is the state of rest. Galileo, later on, suggested that it is not the property of the object to stop if it is in the motion but to resist any change in its motion Newton later on came up with Newton’s First Read more about Newton’s First Law of Motion[…]
We already know that heat is a form of energy. It is a common observation that when we come out of the blanket on a cold morning we feel cold for some time but after that it becomes normal to some extent. So what exactly is happening? Initially heat begins from us to the surrounding Read more about Thermal Equilibrium & Zeroth Law of Thermodynamics[…]
The Second law of thermodynamics states that the state of entropy of the universe, as an isolated system, will always increase over time. The second law also states that the changes in the entropy in the universe can never be negative. Why is it that when you leave an ice cube at room temperature, it Read more about Second Law of Thermodynamics[…]
We have learnt about heat, internal energy and work. We also know how these are related to states of the system. But before going any further we need to define thermodynamics. It is a process that brings about change in the state of a system. Now which quantities determine state of system? These are pressure, Read more about First Law of Thermodynamics[…]
We see so many changes happening around us every day, boiling of water, rusting of Iron, melting Ice, burning of paper etc. In all these processes we observe that the system in consideration goes from an initial state to a final state where some amount of heat is absorbed from the surrounding and some amount Read more about Reversible and Irreversible Process[…]
Before learning about average speed and average velocity, we must know the difference between distance and displacement. Distance is a scalar quantity which generally implies how much ground has been covered by the object. Displacement is a Vector quantity, and it is the shortest possible distance between the start and end point. Ex: If a Read more about Average Velocity and Average Speed[…]
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[…]