natural numbers

. This group of pesticides can kill all insects / animals including all beneficial predators / parasites of pests. The use of ecofriendly pesticides has not offered solutions to many pests (e.g., coconut mites). Where is the solution for pernicious problems? In many countries (including India) the ..

It is a nuclear phenomenon. It is due to the instability of the nucleus. It is a spontaneous, continuous and irreversible process. It is independent of external factors such as pressure, temperature, state of substance, electrical field, magnetic field, catalyst etc. A radioactive ele..

A large number of elements occur inside or around the earth. Less reactive elements, like platinum, gold, nitrogen, oxygen etc., occur in free (native) state. Chemically active elements always occur in the combined state i.e. in the form of compounds containing that element. For instance,..

Ecological Balance - The environment in which the man and other organisms live is called the biosphere. The biosphere is made up of different regions that have different types of flora (plants) and fauna (animals). The types of organisms in an area are determined by various factors such as the clim..

Summary - Man has to be dependent on natural resources despite all the scientific inventions Natural resources could be classified into geographical, hydro-geological, atmosphere, edaphic, forest, crop, wildlife, marine / aquatic, animal, human and microbial resources Natur..

. This is called Avagadro's numbe..

Summary - i) An expression of the form a 0 x n + a 1 x n - 1 +....+ a n = 0, where n is a positive integer and a 0 , a 1 ,...,a n belong to some number system F, is called a polynomial in the variable x over F. ii) The degree of polynomial is defined as the highest index of the variable x..

The formula S = n 2 ( n +1) 2 /4 is used to find the sum of the cubes of the first n natural numbers. Find the sum of the cubes of the first 8 natural numbers. => 1288 or 1304 or 1360 or 1296..

The formula S = n ( n + 1 ) 2 is used to find the sum of the first n natural numbers. Find the sum of the first 14 natural numbers. => 105 or 112 or 98 or 119..

If the arithmetic mean of first n natural numbers is 8, then find the value of n . => 16 or 17 or 15 or 19 or 18..