Wooden sleepers are used in rail tracks because, -  It can bear the pressure given by huge mass of train. -  No huge industrial cost as compared to concrete cemented sleepers. -  Raw material easily available from forests .....

As we know, P = hdg,    Where, P = pressure, h = vertical height,d = density & g= accleration due to gravity. This shows that only the vertical height of the vessel affects pressure, none of the other dimensions have .....

Relative density, or specific gravity, is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. Specific gravity usually means relative density with respect to water. The term "relative .....

The spacesuit that the astronauts wear during their descend to earth is different from the ones they wear during their spacewalks. The space suit for space walks provides a pressurized environment, breathing oxygen, cooling, communication, and .....

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You may have learnt about lactometer. Lactometer is an instrument used to test the purity of the milk. It is based on the Archimede's principle of flotation.

Lactometer is an instrument used to test the purity of the milk. It is based on the Archimede's principle of flotation. The lactometer floats when immeresed in millk. And according to the Archimede's principle for an .....

Liger is the largest animal of the cat family. (Liger is the offspring of a male lion and female .....

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When we clean our hair, we remove dust, dirt and Lices(जुम्रा ). On doing so we keep our hair and ourself healthy. It also makes us look nice and .....

Assume the cost price of one chair be 'x'. Then CP of 10 chairs = 10x From given condition, 10x = 16 * (SP of one chair) SP of one chair = 10x / 16 Here, Selling Price (SP) = 10x / 16 Cost Price(CP) = x. Since SP < CP, Using the .....

The benefits of regular bathing are: - Bathing reduces tension on overstretched muscles. - It improves the blood circulation in our body. - It strengthens our immune system. - It helps to reduce stress. - It betters the functions of organs .....

The word angle comes from the Latin word angulus, meaning "corner". An angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the .....

Given, a=(1,2,3,4,5) and b=(4,5,6,7) To find a - b we subtract the common element of both a and b and write the remaining term in a. Here 4 and 5 are common in both a and b  So we remove 4 and 5 from a and write the remaining term as : a - b = .....

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चिरफारद्वारा शारीरिक उपचार गरी ठीक पार्ने काम .....

When you sit down to a bottle of cold drink with a straw in it, you might say that you are sucking the cold drink up through the straw. In fact, a more accurate description would be to say that the atmospheric pressure is pushing the liquid up the .....

The atomic number of sodium is 11, so its electronic configuration is 2, 8, 1. Sodium atom has only 1 electron in its outermost shell. So, the sodium atom donates 1 electron and forms a sodium ion .....

Here, We have given,    cot12o = x. Now take LHS = sec78o + tan78o                          = sec(90 -12)o + tan(90- 12)o         .....

a) We have given,          Sin43o = m Mow to find cos47o, use formula Cos47o = cos (90o - 43o) =  Sin43o Now, use sin43o = m & get final answer. Similarly try .....

If you are asking to add the question tag in the above sentence, study the following examples first. I am a teacher, aren't I? I am a waiter, aren't I? I am a shopkeeper, aren't I? Now, on the basis of the examples, you can add the .....

In battery, Zinc is the anode (-), the graphite core is the cathode (+) and Ammonium Chloride paste acts as an electrode. Due to a chemical reaction within the battery the anode builds up an excess of electrons. This causes an electrical .....

Mass is the total quantity of matter present in given substance. Another way to define mass is : Mass is a quantity that tells us how much force is required to accelerate an object,

mass = force / acceleration.  [ from, F = .....

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Here,          = a2 + 2ab + b2 + (a+b)         = (a+b)2 + (a+b)           [∵ a2 + 2ab + b2 = (a+b)2]          = (a+b) .....

Here, Devaluation rate (R)= 10% Time (T)= 2 years Price after 2 years (Pt)= Rs. 170 Price before 2 years ago(P)= ? Use the formula, Pt=P(1-R/100)T 170= P(1-10/100)2 Calculate P. For the exchange rate in hence 3 years. Use the .....

Here, Devaluation rate (R)= 4% Time (T)= 3 years Price after 3 years (Pt)= Rs. 9000000 Price before 3 years ago(P)= ? Use the formula, Pt=P(1-R/100)T 9000000= P(1-4/100)3 Calculate P. For the price of land .....

Price of the new car (P)= Rs 360000 Rate of depreciation (R)= 10% Time(T)= 2 years Price of the car after 2 years (Pt)=P(1-R/100)T                                   .....

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LHS = cot2A-cot2B              =    cos2A          cos2B              ______   -  ______       { .....

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Negative      : Ram does not know way to hospital. Affirmative  : Ram knows way to hospital. Negative      : Bhumika does not speak Hindi. Affirmative  : Bhumika speaks Hindi. Note: On the basis of the .....

Health education is a continuous process which motivates and helps people to adopt and maintain sound health practices and lifestyle. Health education is the best medium of preventive health service. It prevents people from all types of illness, .....

Every single person has their own unique identity and culture. An .....

= (1-a2)(1-b2)+ 4ab = 1(1-b2)-a2(1-b2)+ 4ab = 1-b2-a2+a2b2+ 4ab = 1+a2b2+2ab-(a2-2ab+b2) =  (ab)2 + 2ab +12- (a-b)2 = (ab+1)2-(a-b)2 = .....

= x2-y2-x+y = x2-y2-(x-y) = (x+y)(x-y)-(x-y) [a2-b2=(a+b)(a-b)] = .....

Valency of mercurous radical is +1 valency of sulphate ion is -2 So molecular formula of mercurous sulphate .....

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Factorize first two terms you will get ( x + y. ) ( x - y ) - ( x - y ) Take x  - y common You will get ( x - y ) ( x + y - .....