The sources of energy which can be used in replacement of fossil fuels are called alternative sources of energy. In the context of Nepal, following three sources of energy can be used as alternative sources: 1. Hydroelectricity: Nepal is .....

The pressure exerted by layers of air present on earth is known as atmospheric pressure. The atmospheric pressure mainly depends upon altitude, temperature, humidity and rotation of the earth. As the altitude increases, the density of air .....

Archimedes principle states that "for a body submerged in liquid, the upthrust acting on it will be equal to the weight of displaced liquid." i.e. upthrust = weight of the displaced liquid It provides us the method to measure .....

One of the important properties of liquid pressure is, it acts randomly in all direction and increases with depth. So, in the above figure, the pressure at surface M will be less than that at surface N.  There will be the net pressure .....

As you know, the density of water is 1000 kg/m3. Then, 3/4th of the density of water will be 1000 x 3 / 4 kg/m3. Multiply 1000 by 3 and divide the product by 4.  What do you .....

So , according to Pascal's law, Pressure at piston on left = Pressure at piston on right or,  F1/A1 = F2/A2 or, F2 = .....

The density of our body is always greater than the density of water. It is the reason why we will drown in water if we are not swimming. However, in case of swimming, we are able to displace the weight of water equal to our own weight generating .....

The foundation of any building is made wider than the walls. It is done to reduce the pressure on the foundation due to the whole weight of building above it. The pressure gets reduced by making foundation wider as pressure is inversely .....

You know the weight is directly proportional to the acceleration due to gravity.  When acceleration due to gravity increases by 14 times, your weight also increases by 14 times. So, your weight will increase by about 14 times if the earth .....

When the apple is falling, it is under the attraction of the earth's gravity.  Since, apple also has its own mass, it will exert some force of attraction on the earth as well. The force of gravitation acting between them is mutual, that .....

Gravitation is the mutual attraction between two bodies.  The earth attracts the moon.  The moon also attracts the earth.  The force of gravitation of the earth to the moon is equal to the force of gravitation of the moon to the .....

You know the acceleration due to gravity is inversely proportional to the square of the distance of your place from the centre of the earth.  When the square of the distance increases by four times, then your weight decreases by four .....

After finding the mass of the body on earth, you can use the same value of mass for the moon.  Then, how to find the weight on the moon?  You got the mass of body on the moon. The value of acceleration due to gravity on the .....

Human life has been easier because of the advancement of science and technology.  People are using technical equipment to make their life comfortable and fast.  There are numerous new inventions each day.  We are connected to the .....

After getting the value of x.  Put, the value of x in 2x and 3x. You got the .....

Man is a social animal. There are certain needs that are fulfilled within a society. Like the need for food, clothes and so on. Life of a man depends on others and vice versa. Staying together makes us complete human beings by learning values, .....

You can find the circumference of circle. Here, circumference is the total length of wire used to form a circle. Since, the wire is used to form a circle and a square,  Circumference of circle = Perimeter of square. You can solve this .....

now, you can calculate length, breath and height of the room by using, area of .....

यी दुबै वाक्य पूर्ण छन् नि होइन र ? ‘अब रसिक लेख्छन् ।’ मात्र भनियो भने .....

.....

अब, माथिको खेलाउँछ क्रियापदमा ‘खेल्’ धातु र ‘खेल्नु’ .....

क्रियामूल यस्ता शब्द हुन्छन् :

जा + नु = जानु

खेल् + नु = खेल्नु

पढ् + नु = .....

संस्कृतभाषाबाट आएका शब्दहरूमा मात्र ‘श’ र ‘ष’ को प्रयोग हुन्छ । नेपाली भाषामा अरू .....

जुनसुकै शब्दहरू जस्तो लेखिन्छ त्यस्तै बोलिन्छ भन्ने छैन । बोल्दा .....

अल्पविराम चिन्हले वाक्यलाई थोरै रोक्ने गर्छ । प्रश्नवाचक चिन्हले .....

यसरी हेर्दा, वाक्यमा .....

 तलका सबै प्रश्नहरुको उत्तर दिनुहोस् : 

यसमा प्रयोग भएको जस्तै    :    -   .....

अंकको शिरबिन्दुले ‘ङ’ उचारण समेट्दैन । त्यसैले अङ्क प्रयोग गरे हुन्छ .....

यी शब्दहरूमा एउटा शुद्ध रूप हो भने अर्को अशुद्ध रूप हो । एउटा लेखिने रूप हो .....

ठिक अक्षरहरू ठिक ठाउँमा प्रयोग नभए तिनीहरूको अर्थ हुँदैन । नेपाली भाषामा पनि अक्षरहरू .....

To find single equation we simply multiply the .....

त्यसैले मुजुर शब्द माइजू दिर्घ लेखिएकै आधारमा दिर्घ हुनुपर्छ भन्ने .....

Now after getting d ,you can find the .....

.....

Find the mean? Find d=(x-mean) find d2 multiply frequency 'f' and d2 . Find the sum of fd2 Then Use the .....

Find the mean? Find the difference of each data and mean denote the difference by 'd' then find its modulus  Add all |d|. Divide that sum by N which is the value of .....

M - N means to subtract all the elements N from M. Can you write the elements of  M - .....

All these compounds are alkanes. What difference can you find in these .....

It is a type of alcohol. isn't .....

I presume, this question is from chapter 'Carbon and its .....

Yes, it can form four bonds at most. On the basis of how many bonds a carbon atom can form with another carbon atom, we can divide hydrocarbons into two types. Saturated and .....

.....

As the carbon atom has 4 electrons in the outer orbit, it has three possible ways to gain stable electronic configuration. It can loose its 4 electrons from the outer orbit. Then, it will have only the first orbit with 2 electrons. You know the .....

However, if there is more than one covalent bond between carbon atoms, it is called as unsaturated hydrocarbon. It can be either alkenes or alkynes. If there is two covalent bond between carbon atoms, it is known as alkenes. They are .....

Gold is a precious metal used for making coins and jewelleries, It is used to make gold-leaf electroscope that detects the charge. It is used in gold plating. It is also used in photography ( Auric chloride). It can be used to make .....

Silver is one of the precious metal. It is used for making coins and jewellery. It has whitish metallic lustre. It is a good conductor of heat and electricity. Also, it is ductile and .....

Take an iron piece, a copper piece and an aluminium piece of any size. Place all of these three pieces at open place for a night.  Observe the pieces of iron, copper and aluminium next morning.  What difference do you see in the .....

You know about the ore.  It is a compound of a metal from which we extract the metal. We can extract copper metal from different compounds.  Chalcocite, Chalcopyrite and Calverite are the most common of them.  These are the .....

The wooden stick breaks into two pieces. But, the iron rod doesnot break.  Iron is strong and unbreakable.  If you apply a greater effort, the rod bends.  But it does not break into .....

Ammonia is used as a .....