Accuracy, Precision and Error Measurement Why do we need measurement? Measurement is the foundation for all experimental science and technology. Science is the study of nature and we need to use what we see in nature in our calculations. Today we know that the acceleration due to gravity is 9.8 m/s2 but would we be able Read more about Accuracy, Precision and Error Measurement[…]
Conservative Force and Non Conservative Forces The work done by the gravitational force does not depend on whether an object falls vertically or slides down a sloping incline. All that matters is the change in the object’s elevation. On the other hand, the energy loss due to friction on that incline depends on the distance Read more about Conservative Force and Non Conservative Forces[…]
Mean Free Path The molecule of a gas move with high speeds at a given temperature but even then a molecule of the gas takes a very long time to go from one point to another point in the container of the gas. This is due to the fact that a gas molecule suffers a Read more about Mean Free Path[…]
Concave and Convex Mirrors Let us know about convex mirrors and concave mirrors. Mirror is a surface which reflects a clear image. Images can be of two types: Real image and Virtual image. An image which can be formed on the screen is known as real image and the one which cannot be formed on Read more about Concave and Convex Mirrors[…]
Weightlessness We often hear that an astronaut experiences weightlessness in space. What does this mean? Let us perform a simple experiment to demonstrate weightlessness. Suspend a stone from a spring balance, the pointer of the spring balance shows the weight of the stone. Allow the spring balance along with the stone to fall freely. The Read more about Weightlessness[…]
Stress Strain Curve Stress strain curve is the plot of stress and strain of a material or metal on the graph. In this the stress is plotted on Y – axis and its corresponding strain on the x – axis. After plotting the stress and its corresponding strain on the graph, we get a curve, and his Read more about Stress Strain Curve[…]
Stress and Strain When a stretching force (tensile force) is applied to an object, it will extend. We can draw its force – extension graph to show how it will extend. Note: that this graph is true only for the object for which it was experimentally obtained. We cannot use it to deduce the behaviour of another object even Read more about Stress and Strain[…]
Elastic Behaviour of Solids The property of the body because of which they are able to come back to their original status after removing the external force applied is called elasticity. In a solid, each atom or molecule surrounded by neighbouring atoms or molecules. These are bonded together by inter atomic or intermolecular forces and Read more about Elastic Behaviour of Solids[…]
Equation of Continuity The continuity equation describes the transport of some quantities like fluid or gas. The equation explains how a fluid conserves mass in its motion. Many physical phenomena like energy, mass, momentum, natural quantities and electric charge are conserved using the continuity equations. This equation provides very useful information about the flow of Read more about Equation of Continuity[…]
Torque Torque is the result of applying a force to rotate an object around an axis. It is a measure of the tendency of a force to change the rotational motion of an object. In a previous section, angular acceleration was introduced, but the possible sources of this were not discussed. Applying a force to Read more about Torque[…]