power of suggestion

= 200 Mev = 200 x 1.6 x 10 - 1 3 J = 3.2 x 10 - 1 1 J 1kW = 1000 W = 1000 Js - 1 If x be the number of fissions per second required to generate a power of 1kW, then..

The principle of quantisation of electric charge states that "in nature there is a smallest amount of charge and all other charges are integral multiples of this smallest unit ". That is, if e is the minimum charge then the total charge on the body is equal to ne where n is an integer. This fact t..

> How do infrared and g - rays differ in their (i) wavelength and (ii) penetrating power. Suggested Answer:- (i) g - rays have much shorter wavelengths of the order of 10 - 1 3 m while the infrared have longer wavelengths of the order of 10 - 6 or more. (ii) g - rays have a much higher pe..

Steering wheels, spanner, screw drivers and bicycle pedals all use the principle of wheel and axle. Solved Examples: Example 1 : Figure below shows the use of a lever to lift a boulder of weight 3000 N by applying a suitable effort at C. If AB = 1 m and BC = 6 m, calculate the effort required to li..

In class III levers effort is situated between the load and the fulcrum. (shown in the figure below) ..

. The major problem of corrosion occurs with iron (or steel) as it is used as a structural material in industries like construction, infrastructure, bridges, rail transport power transmission, shipbuilding, automobiles, heavy industries etc. Aluminium, another useful structural metal, als..

>Three types of radiation from recognized radioactive elements are a -particles, b -particles and g -radiation. It was realized that radioactivity of an element is independent of its physical state, its chemical environment or temperature, suggesting that it is a property of the nucleus i..

The energy of thermal radiation emitted per unit time by a black body of surface A, is given by u = s AT 2 -----(1) where s is a universal constant known as Stefan-Boltzmann constant and T is its temperature on absolute scale. The measured value of s is 5.67 x 10 - 8 W/m 2 - K 4 . Equation (1) itse..

B-3 and B-4 type questions in the question paper demand long essay-type answers. Both these questions need to be answered with care and adequate preparation. Read the 'Main Course Book' completely at least once so that you can be familiar with a wide range of subjects. Answer all the 'Reading..