Solubility is the property of a solid, liquid, or gaseous chemical substance called solute to dissolve in a solid, liquid, or gaseous solvent. The solubility of potassium nitrate is 40 at 30 degree .....

√2/Cos ϴ +2=0 or, √2/Cos ϴ  = -2  or, cos ϴ = -1/√2 or, cos ϴ = cos135o Therfore,  ϴ = .....

Here, cos330 = √3 /2 or, cos( 2* 165) = √3 /2 We know,  cos 2x = 1 - 2sin2x or, cos( 2* 165) = √3 /2 or, 1 - 2sin2 165 = √3 /2 oe,  1 - √3 /2 = 2sin2 165 or, (2 .....

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The magnet in a magnetic compass interacts with the earth’s magnetic field and aligns itself to point to the magnetic poles.  Therefore, a compass needle points slightly away from the geographical .....

Vector i can be written as:  1*i + 0*j  Also,  Vector j = 0*i + 1*j We know,  i . j = (1*i + 0*j )* (0*i + 1*j ) = 1*0 + 0*1 = 0 Therefore, i* j = 0 Again, j*j = (0*i + 1*j )(0*i + 1*j ) = 0*0 + 1*1 = .....

At the two magnetic poles, the magnetic needle rests vertically. Therefore angle of dip at the two poles is 900. At the magnetic equator, the magnetic needle would rest horizontally. Therefore angle of dip at equator is .....

The two observation in support of the theory that the earth has its own magnetism are: 1. A freely suspended magnet always points to north-south direction due to the earth's magnetism.  2. Angle of dip and angle of declination exist .....

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Earth’s Magnetic North Pole is not same as Geographical North Pole. Magnetic North Pole lies around 1000 Miles south of Geographical North Pole, in Canada that is where compasses point to. Due to this, the north pole of a compass needle .....

If lodestone is allowed to freely spin, its north pole will always align itself towards the earth's geographic north pole. Hence, lodestone is called a natural magnet. It is black in color and very shiny when polished. It was actually used .....

प्रकृतिको विषयमा कविता लेख्न निम्न कुरामा ध्यान दिनुहोस् है तः पहिला प्रकृतिको कुन .....

The Comprehensive Peace Agreement was an agreement between the government of Nepal and Maoist to settle Maoist insurgency. The two major achievements were as follows: - The agreement formally ended the Nepalese Civil War that began in 2052 BS. - .....

You may know that, an electromagnet works in the following way: When current flows through it, it becomes magnetized, and immediately current stops flowing, it loses its magnetism. Soft magnetic bodies are used to make electromagnet .....

The following measures should be done to establish peace in the country. - Any kinds of discriminatory behavior among the people should be settled. - The judiciary of the country should be independent and it should make the decision fairly. - The .....

Let, a should be subtracted. Now, (-72) - a = + 105 or, -72 - a = 105 or, -72 - 105 = a or, -177 = a or, a = - .....

Everybody wants to be a good person in life. To be a good person you need to do the following things in your life: - You should develop the habit of respecting your seniors and loving the kids. - You should be polite to your friends, families and .....

You know that electromagnet is a temporary magnet in which the magnetic field is produced by an electric current. An electromagnet, by its very nature, is not magnetised unless a current is flowing through the coils surrounding it. Therefore an .....

You may know magnification means increase in size. By contrast, demagnetiztion means to reduce the size of something, such as a photographic image or an electron beam. Here, the image formed is comparatively smaller in size than .....

Antonyms: fall : rise cries : laughs patient : impatient  polite : impolite hard working: lazy helpful : unhelpful, unfriendly  funny : .....

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You know sporulation is the method of asexual reproduction which take place by means of spores. This method is common in Mucor, Moss, Fern, Marchantia, Rhizopus etc. Vegetative propagation is also a method of asexual reproduction in higher .....

A Callus is an area of skin which has become relatively thick and hard in response to repeated friction, pressure, or other irritation. Callus are most often found on feet because of frequent walking. Calluuses are generally .....

In the animal kingdom, there are numerous animals that makes the list of most powerful bites.  However,the world’s strongest bite force is of Saltwater .....

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Hint: Since, ABCD is a parallelogram, then AB = CD aan AB//CD. [ being opposite sides of the parallelogram] Herem, P and Q are midpoints of AB and CD respectively.   AP = PB = CQ = QD. Now, we can say that AP=CQ and AP//CQ. Hence APCQ .....

All air contains water, but near the ground it is usually in the form of invisible gas called water vapour.  When warm air rises, it expands and cool. Cool air can't hold as much water as warm air. So, some of the vapor condenses onto .....

The difference between internal and foreign trade is shown in the flowing points: - The internal trade takes place within the boundaries of the country whereas, external trade takes place    outside the country. - Internal .....

h)      3/9 + 7/8 + 5/6 + 7/12  = 1/3 + 7/8 + 5/6 + 7/12 =  (1/3) x (8/8) + (7/8) x (3/3) + (5/6) x (4/4)  + (7/12) x (2/2) [ making denominator equal] = 8/24 + 21/24 + 20/24  + 14/24. = (8 + 21 + 20 + .....

  3/20 + 1/10 + 5/15 = (3/20) x (3/3) + (1/10) x (6/6) + (5/15) x (4/4) [ Making denominator equal] = 9/60 + 6/60 + 20/60 = (9 + 6 + 20)/60 = 35/60 = .....

      3/16 + 1/4 + 3/8  = 3/16 + (1/4) x (4/4) + (3/8) x (2/2)  [ making denominator equal]  = 3/16 + 4/16 + 6/16  = (3 + 4 + 6)/16 = .....

On the basis of Energy: It is based on principle of conservation of .....

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do first cross-multiply, then you will  .....

Since given sequence is geometric sequence, then, (a - 2)/a = (a+1)/(a -2)  [ t2/t1 = t3/t2]     (a - 2)2 = a(a + 1) or, a2 - 4a + 4 = a2 + a or, 4 = 4a + a or, 5a = 4 or, a = .....

The society is a diverse group of people. People from different socio-cultural environment live together in a society. Similarly, people belonging to different castes live in a society. However, no caste is upper or lower. All are equal. But, .....

Chandra : Hey Deepika! How are you? Deepika : Hey, I am good. What about you? Chandra : I am fine. And where are you going right now? Deepika : I am going to watch a movie. Chandra : Oh! So am I. Which movie are you going to .....

Here total weight of box with biscuits = 16 kg 120 g = 16 x 1000 + 120 = 16120g So, weight of biscuits only = total weight  - weight of empty box = 16120 g - 625 g                      .....

In winter season, the temperature of the surrounding is very low. Because of this, the volume of water pipe decreases whereas the volume of water in the pipe increases. This change in volume of pipe and water cause bursting of .....

Let, <B = x, Then, <AOC = x ,    [ being opposite angles of //gm] And. Ref.<AOC = 2x.    [ centeral angle is twice of inscribe angle on same arc AC] Now,  x + 2x = 3600 Find x, which is your .....

Nepal is an agricultural country. About 74% of the total population is engaged in agriculture. Although Nepal is agro-based country, the agriculture has not been commercialized yet. For the commercialization of agriculture, the following .....

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As A+B=225o,  tan(A+B)=1. Hence,

or,[tanA+tanB]/[1−tanAtanB]=1 

or,  tanA+tanB=1− tanAtanB 

 or,tanA + tanB +  tanAtanB = 1

and adding 1 on both sides, we .....

We have to solve,  CosA + sinA =  cos2A + sin2A or, [cos2A - cosA] + [Sin2A - sinA] = 0  Now using formula, CosC - CosD = 2Sin[(C+D)/2]Sin[(D-C)/2] and SinC - SinD = 2Cos[(C+D)/2]Sin[(C-D)/2] We get,  or, .....