reference point

Temperature is a measure of hotness or coldness of a body. It is a measure of kinetic energy possessed by the molecules. A hot body is said to be at a higher temperature and a cold body is said to be at a lower temperature. The devices used to measure temperature are called Thermometers. The subst..

The rays of light parallel to the principal axis of a mirror after reflection, either pass through a point (in the case of a concave mirror) or appear to diverge from a point (in the case of a convex mirror) on the principal axis and this point is referred t..

An equation corresponding to a set of points with reference to a system of coordinate axes may be simplified by taking the set of points in some other suitable coordinate system, such that all geometrical properties remain unchanged. One such transformation is th..

The branch of physics dealing with measurement of temperature is called thermometry. A number of physical properties of a substance change almost linearly with temperature. This forms the basis or principle for construction of thermometers. Different scales of temperatures have been adopted. For e..

An equation corresponding to a set of points with reference to a system of coordinate axes may be simplified by taking the set of points in some other suitable coordinate system, such that all geometrical properties remain unchanged. One such transformation is that in ..

Displacement vector is a vector which gives the position of a point with reference to a point other than the origin of the coordinate system. Let a particle at a point P at an instant of time t, move to another point Q at time t l . The position v..

The rays of light parallel to the principal axis of a mirror after reflection, either pass through a point (in case of a concave mirror) or appear to diverge from a point (in the case of a convex mirror) on the principal axis and this point is referred to..

It is not possible to measure the absolute potential of a single electrode because neither the oxidation nor the reduction reaction can occur by itself. Also, we need two electrodes to measure the potential difference between two points. This difficulty can be solved selecting one o..

>. Atomic masses are not expressed as whole numbers because natural elements are mixtures of two or more isotopes. The atomic weight of chlorine is 35.43 amu. Chlorine exists as two isotopes in the ratio. Therefore average atomic masses are not whole numbers. Avogadro explained further that there a..

>This work done, is stored in the body as gravitational potential energy. To be more precise, mgh is the energy of the Earth - Body system. The potential energy at a point depends on the reference level. However, the difference of potential energy between two points is..