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Melting point of pure ice at normal atmospheric pressure is regarded as the lower fixed point. ..

This scale of temperature was devised by Gabriel Fahrenheit (1687-1736). The lower and upper fixed points in this scale are considered as 32 0 F and 212 0 F respectively. The interval of 180 0 F is divided into 180 equal parts. Each part is known as 1 0 F. This is widely used by doctor..

Light not only bounces off surface it goes through some of them often slowing down and changing direction in the process called refraction. It occurs at the point where light travels from one medium to another of different density. Refraction produces mirages and rainbows. When a ray of light (i.e...

. Let Q be the energy transferred as heat through the slab, from its hot face to its cold face, in time t. Experiment shows that the conduction rate p c o n d (the amount of energy transferred per unit time) is -----(i) In which k, the thermal conductivity, is a constant that depends on the materia..

Radius of Gyration - It is the distance from the axis of rotation at which, if the whole mass of the body were to be concentrated, the moment of inertia would be the same as that with the actual distribution of mass. It is denoted by K. If the mass of a body is M and the radius of gyration is K, th..

Force - A force is often defined as a "push" or a "pull". There is nothing untrue with this statement, but does not really tell you much about a force. Instead of defining force, it substitutes an antonym. A physicist prefers to define a force in terms of what it does. Just what does a force do? Su..

Consider the same situation as in the above section. Let the particle move from P to P 1 with velocity v in time dt. Let d q be very small. We know th..

Equation (2) becomes From equations (1) and (3) we get [PF = f, PB 1 = v, PB = u, PC = 2f] Dividing both sides of the equation (4) by uvf we g..

) In the quadrilateral ALOM (From Snell's law) As the angle of incidence is increased, angle of deviation ..