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Ultrasound refers to sound with a frequency above 20,000 Hertz,    whereas infrasound refers to sound with a frequency below 20 Hz. Ultrasound is used for scanning, and range and direction  finding, while infrasound is used by .....

Urban areas have the potential to pollute water in many ways.Runoff from streets carries oil, rubber, heavy metals, and other contaminants from automobiles.Untreated or poorly treated sewage can be low in dissolved oxygen and high in pollutants .....

कुनै व्यक्तिका नाउँमा सञ्चार साधनद्वारा  रुपियाँपैसा र यस्तै अरु माल सामान   पठाउने काम, .....

विश्व शान्ती कायम राख्न संयुक्त राष्ट्र सङ्घले खेलेको भुमिकालाई निम्नानुसारका सात बुदामा .....

हिमाल्, पहाड र तराइको जनजीबनमा निम्न कारणले असार पार्छ । ती क्षेत्रहरुमा रहेको मौसमी र .....

राष्ट्रिय समावेशी आयोगले निम्न कार्य गर्छ: १ सिमान्कृत्, दलित, पिछडा बर्गका हकअधिकारको .....

भविष्‍यका पिँढीका आवश्यकताहरूसँग सम्झौता नगरीकन वर्तमान पिँढीका आवश्यकताहरू परिपूर्ति .....

देश वा एकै राज्यको बिभिन्न ठाँउमा बस्ने मानिसहरु भिन्न भिन्न आबश्यकता हुन्छन् । एकै प्रकारका .....

माथी दिइएको चित्रमा नेपालका प्रचलित बाजाहरु देखाईएकोछ । उक्त चित्रहेरी त्याहा कुन कुन .....

सङ्घीयतामा प्रान्तीय सरकारले गर्ने प्रमुख कार्यहरु देहायबमोजिम उल्लेख गरिन्छ: - प्रान्तीय .....

संयुक्त राष्ट्र सङ्घीय मानव बसोबास कार्यक्रमको प्रमुख उद्देश्य फोहोर बस्तीमा बसोबास गर्ने .....

स्थानीय स्तरको विकास प्रस्ताव निम्न चरणहरुमा पुरा .....

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Metal filament wire is a main part of the bulb. When electricity pass through the metal filament wire, it emits light. And othre parts of the bulb supports the emission of .....

An electric circuit is a path in which electrons from a voltage or current source flow. The point where those electrons enter an electrical circuit is called the "source" of electrons. Direction of current is from negative pole to .....

There are many reasons behind it. 1) Pollution: Factories produced lot of pollution like noise, smoke, and different types of gases     based on the type of factory. 2) Transport: Heavy vehicles come to factories for both pick up and .....

Soil pollution is another form of land pollution, where the upper layer of the soil is damaged. This is caused by the overuse of chemical fertilizers, soil erosion caused by running water and other pest control measures; this leads to loss of .....

Obviously, you are familiar with earthquake. Earthquake takes place naturally. So, it is a natural disaster. And you might have seen fire in jungle or any factories, industries etc. It is cause by misbehave of human. So, we call it man made .....

Here, Total Cost Price of radio = Cost Price + Cost of repair = Rs.(1230 + 170) =  Rs. 1400 Loss% = 4%. Selling Price(SP) = ? We know, SP = CP( 100 - L%)/100 = 1400 * ( 100 - 4)/100 = Rs. .....

An eletric motar convert electric energy  to mechanical .....

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We know, the center of two end points of diameter is the radius. So, using mid-point formula, the mid point of (3, 2) and (-1, 6) is: ((3 -1)/2, (2+6)/2) = (1, 4). So, the co-ordinate of the mid point of circle (h, k) is (1, 4). Now, the radius .....

Here, the pair of straight lines have equation 9x2 - 24xy + 16y2 = 0 Comparing the equation with ax2 + 2hxy + by2 = 0, we get, a = 9 2h = -24 h = -12, and b = 16 We know, the condition required for homogeneous pair of straight line to be .....

Generator is a device that converts mechanical energy  into electrical energy. It is constructed under the principle of electromagnetic induction. There are various ways by which  the magnitude of current produced by  the generator .....

Given, equation of the lines,   2x - y + 4 = 0 ............ (i) Slope of (i) m1 = 2  [ slope of the line = -coff. of x/coff. of y] and, 3x + y + 3 = 0 ............. (ii)  Slope of (ii) m2 = -3  Now, angle between them .....

A bicycle dynamo has one or more permanent magnets with coils of wire spinning inside their poles. The device consists of a stationary part called a sator and a rotating part called an armature. When the coil spins in the magnetic field created by .....

In physics, mass–energy equivalence states that anything having mass has an equivalent amount of energy and vice versa, with these fundamental quantities directly relating to one another by Albert Einstein's famous formula: E = .....

Here, f(x) = x3 - (P - 2)x2 - Px + 28  Given that, when f(x) is divided by (x + 3), the remainder is 10. Comparing (x + 3) with (x - a),  a = -3. Now, using remainder theorem,  We know, f(a) = Remainder. or, f(-3) = .....

Well, the present constitution of Nepal is an inclusive constitution than the previous constitutions. The present constitution of Nepal has made the provision of secularism to respect all the religions followed in this small country. It has .....

Kwh is the amount of electricity energy consumed by an electrical alliance having a power rating of 1Kw in 1 hour. 1kwh = 1 unit. 1kwh = 1000 x 60 x 60           .....

Definitely, you are right. The present constitution of Nepal is the product of Constitution Assembly .....

The constitution is the supreme law of the nation. It is the supreme law in the sense that any laws inconsistent with this law are avoided. The constitution is the set of fundamental principles which defines the structure of the .....

Electromagnet is the temporary magnet made by passing electric current through a solenoid with a core of soft iron. We can increase the strength of electromagnet by the following ways 1. By increasing the number of turns of coil. 2. By .....

Here, In 30 days Ram and Ramesh can do 1 work.            In 1 days Ram and Ramesh can do 1/30 work.   Again,   In 120 days Ramesh can do 1 work.         In 1 days Ramesh can do .....

Positive discrimination: The term positive discrimination means the more support to the weaker. It is positive discrimination in the sense that the weaker are given more priority in terms of power and opportunities to uplift them as the powerful .....

Dear, Niraj! Could you please check your query once? While reading aloud, it sounds .....

The hour hand completes one complete rotation in 12 hours. So,12 hours = 360o Now, When it is 7:20, the hour hand moves, 7 + (20/60) hours = 7 + 0.33 = 7.33 hours Now, 7.33 hours = 360/12 * 7.33 = 219.2o   Now, you may also know that .....

Here, arc length = l(let) for first case,   θ = 75 Now, radius of first circle (r1) = l/θ = l/75 For second case, angle (θ) = 90 Now radius of second circle (r2) = l/θ  = l/90 Hence the ratio of radii .....

Here, l = 2 cm           θ = 12∘30' = 12∘ + (30/60)∘ = 12∘ + 0.5∘ = 12.5∘ now we know, r = i/ .....

Now, selling price of two radios SP = 2800 + 2800 = Rs. 5600. Again, cost price of two radios, CP = 28000/11  + 28000/9                                   .....

Now time to cover 50.4 km = 50.4 km/speed                                              = 50.4 km/26.4 per hour   .....

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You may know that solubility is the amount of solute that dissolve in 100 gm of solvent at given temperature. So, the solubility of copper sulphate is 75 at 60 degree means 75 gram of copper sulphate dissolve in 100 gm of solvent at that .....

To test whether the solution is saturated or not, add solute in that solution. If the solute dissolves, the solution is unsaturated. If the solute falls to the bottom, this means that it couldn't dissolve because the solution is .....

Human was living old tradition, weren't .....

When an object (AB) is placed between the poles and the focal point (F),  Image (A'B') is formed behind the mirror.  Since the rays reflected from the mirror do not intersect,  their extensions behind the mirror .....

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