Here, Initial population = 7200 Total % ( decreased) = 5% + 2% = 7% Population after 1 year = ? We know, PT = P { 1 - R / 100}T       = 7200{ 1 - 7 / 100}1       = 7200 X 93/100       = .....

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Hydrogen is a chemical element with the symbol H and atomic number 1. With just one proton and one electron, it is the most common element, making up 75% of the mass of the entire universe. Hydrogen gas is colourless, odourless, .....

In sentence 1, the verb 'write' refers to present time. In sentence 2, the verb 'wrote' refers to past time.  Therfore, a verb that refers to past time is said to be in the Past Tense; as ,  I wrote     .....

 एउटा घटना बाल मनोविज्ञानमा आधारित कथा हो ।    यस कथामा विद्यालयमा पढ्ने बालबालिका र तीनको .....

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 विद्यार्थीको   शैक्षिक सफलतामा  जातीगत प्रभाव रहेको हुन्छ .....

Every human is born equal. You can respect the rights of others by treating them equally. There shall be no discrimination on the basis of caste, race, religion, language and others. Did you get the point, if not you may ask again. We will .....

Let us take some example, 12, 13, 14 and 15 are consecutive numbers. 22, 24, 26 and 28 are consecutive even numbers. 1, 3 , 5 , 7 are consecutive odd numbers. Numbers which follow each other in order, without gaps, from smallest to .....

In the above sentence can you find the word .....

(3/4-2/5×1/4)÷13/15 = (3/4-2/20)÷13/15 =(3/4- 1/10)÷13/15 =(3x 5- 1x 2) / 20÷13/15 =(15 - 2) /20÷13/15 = 13 / 20 x 15/  13 = 15 / 20  = 3 / .....

Diamonds sparkles more than glass because of more refractive index of .....

The bubble seen in the skin after burn or pressure is called blister. It is filled with a clear fluid. Its basically interstitial (between the cells) fluid. After injury, the cells break down adding their intracellular fluid to this .....

a) Cu + 2AgCl → CuCl2 + 2Ag b) HgCl2 + 2KI → 2KCl + HgI2 c) Pb (NO3)2 + NaSO4 → PbSO4 + .....

A catalyst is a molecule that speeds up the rate of the reaction without being consumed. This leads us to the other two reaction types, acid and base hydrolysis reactions. Acids and/or bases can behave as catalysts, functioning to drive a .....

Some reactions do not take place in the dark but take place only in the presence of light or some other radiation. Such reactions are known as 'photochemical reactions'  For example: Photosynthesis of HCl gas: H2 (g) + .....

In the reaction between hydrochloric acid and sodium thiosulphate, the concentration of sodium thiosulphate affects the rate of reaction directly. That is, the rate of reaction increases on increasing the concentration of sodium .....

The relative amounts of reactants and products are slightly different because of the temperature changes. Reaction rates can be increased if the concentration of reactants is raised. An increase in concentration produces more collisions. So, by .....

A balanced chemical equation can provide the following information : 1) The reactants and products through their symbols and formulae. 2) The ratio of molecules of reactants and products. 3) As molecular masses are expressed in unified mass (u), .....

A decomposition reaction is a type of chemical reaction where one reactant yields two or more products. The general form for a decomposition reaction is       AB → A + B Water can be separated by electrolysis into hydrogen .....

In an acid-base reaction, the acid neutralizes the base and the base neutralizes the acid, and the products formed are neutral. So, this reaction is called the neutralization reaction.  For example, hydrochloric acid reacts with sodium .....

While burning in air, magnesium combines with oxygen present in the air and forms magnesium oxide.  2Mg + O2 ---------> 2MgO Here, two substances (magnesium and oxygen) reacts to give a single substance (magnesium oxide).  So, this .....

(i)  Positive catalysts:

A catalyst which increases the rate of reaction is called positive catalyst. Such catalyst decreases activation energy by accepting a smaller path, so rate of reaction is .....

1. Combination reaction is the addition two or more reactants to give a single product while decomposition reaction is the dissociation of a reactant to give two or more products.  2. Combination reactions result in bonding of atoms to .....

1. Word equation includes the names of reactants and products while formula equation includes the molecular formula of reactants and products.  2. Word equation is less informative while formula equation is more informative (as it gives .....

Velocity of the sound produced by anyone is same for a medium. So, the wavelength and frequency of a sound are inverse to each other as suggested by the wave equation (v = f x λ). More the frequency, lesser will be the .....

The audibility of a sound depends on its frequency. So, we have to find out the frequency of the sound to whether we can hear it or not.  Here, The velocity of the sound (v) = 1400 m/s. Wavelength of the sound (λ) = 1 km = 1000 .....

One of the factors that affects the intelligibility of a sound is the sound pressure level. The sound which is loud enough but not too loud has the best intelligibility. Moreover, the sound which is sharp enough is more intelligible than a dull .....

Tha range of human audibility is 20Hz ot .....

Velocity of sound is inversely proportional to the density of air.  More the density of air, less will be the velocity of sound in the air.  Less the density of air, more will be the velocity of sound in the .....

Double fertilization ocuurs in most of the angiosperms.  After pollination, the pollen grain in the stigma produces a pollen tube that runs through the style to the ovary. It penetrates the wall of the ovary and releases the two sperms .....

The word 'pulmonic' refers to anything related to the lungs.  Thus, pulmonic diseases are the lung diseases such as asthma, pneumonia, tuberculosis, lung cancer, bronhitis, and so .....

Plants release water vapour regularly by transpiration. So, there is a regular and almost uniform release of water vapour from the forest area. This helps in regular formation of clouds and regular rainfall. Thus, a forest helps to regulate the .....

Here, 2A = 2 ( 3           3) = ( 6         6) 3B = 3( -3          4)  =( -9              12) So, 2A - 3B = ( 6  .....

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