Describing Motion with Words Introduction to the Language of Kinematics Introduction Scalars and Vectors Distance and Displacement Speed and Velocity Acceleration A typical physics course concerns itself with a variety of broad topics. One such topic is mechanics – the study of the motion of objects. The first six units of The Physics Classroom tutorial will involve an…
A blackbody refers to an opaque object that emits thermal radiation. A perfect blackbody is one that absorbs all incoming light and does not reflect any. At room temperature, such an object would appear to be perfectly black (hence the term blackbody). However, if heated to a high temperature, a blackbody will begin to glow with thermal radiation. In fact,…
Newton’s Law of Cooling states that the rate of change of the temperature of an object is proportional to the difference between its own temperature and the ambient temperature (i.e. the temperature of its surroundings).
A measure of the ability of a material to allow the flow of heat from its warmer surface through the material to itscolder surface, determined as the heat energy transferred per unit of time and per unit of surface area divided by thetemperature gradient, which is the temperature difference divided by the distance between the two surfaces (thethickness of the material), expressed in watts per kelvin per meter
Heat is a form of energy which transfers between bodies which are kept under thermal interactions. When a temperature difference occurs between two bodies or a body with its surroundings, heat transfer occurs. In this article, we are going to deal with the different modes of heat transfer. Heat transfer occurs basically in three modes: 1. Conduction…
Stress strain curve is a behavior of material when it is subjected to load. In this diagram stresses are plotted along the vertical axis and as a result of these stresses, corresponding strains are plotted along the horizontal axis. As shown below in the stress strain curve. From the diagram one can see the different mark points…
Stress The stress applied to a material is the force per unit area applied to the material. The maximum stress a material can stand before it breaks is called the breaking stress orultimate tensile stress. Tensile means the material is under tension. The forces acting on it are trying to stretch the material. Compression is when the forces…
HOOKE’S LAW Hooke’s Law is a scientific law which concerns itself with the elasticity of materials. It states that when a force is applied to a spring, the displacement of that spring will be directly proportional to the amount of force applied. Graphical representation of Hooke’s Law [2] As an equation, it can be written…
The seven crystal systems are a method of classifying crystals according to their atomic lattice or structure. The atomic lattice is a three dimensional network of atoms that are arranged in a symmetrical pattern. The shape of the lattice determines not only which crystal system the stone belongs to, but all of its physical properties and appearance….
The beauty and symmetry of crystals have fascinated people for thousands of years. Somehow, they seem different from more ordinary matter. However, most solid objects are made of many tiny interlocking crystals. It is only occasionally that the individual crystals are large enough to catch our attention, as in these beautiful examples. Celestite Sulfur Pyrite The…