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- Educated women are capable of bringing socio-economic changes.  - It helps a woman to live a good life. - It helps women to better their healthy life. - Educated women are more informed of their rights for justice. - Women .....

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यसरी हाइड्रोलिक प्रेसले बल प्रवर्धन गर्द्छ भनी हामी पुस्ती गर्न सक्छौँ .....

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These life forms have different species of their own. The variety of these life forms in species level is called the Species diversity. Species diversity is a kind of biodiversity. Hence, species diversity is related with .....

खाली ठाउँ भर्ने प्रश्नमा वाक्य चाहिँ पूरा लेख्नुपर्छ है त साथी, अनि खाली ठाउँमा जे कुरा भरिन्छ .....

You may know Einstein mass energy relation, E=mc2 Here, m =1g = 1/1000kg c= speed of light = 3 x 108m/s Calculate .....

These resources can not be re-made at the same rate as compared  to the rate of their consumption. The over-consumption of fossil fuels can cause fossil fuel to run out creating energy crisis. Hence, fossil fuels are called as limited .....

You know we get heat and light energy from the sun. This heat of the sun helps to change the presssure of air at different places. This change in pressure causes the air to move. Thus, wind energy is created. So, wind energy is considered as an .....

You know sun has sufficient amount of hydrogen gas. And there is high temperature which is the condition required for thermonuclear fusion. Also,this reaction provides all other forms of energy. In this reaction, two or more light nuclei .....

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Lukemia is the type of cancer that affects bone and bone marrow. Leukemia begins in a cell in the bone marrow. The cell undergoes a change and becomes a type of leukemia cell. Once the marrow cell undergoes a leukemic change, the leukemia cells .....

Slope of equation 5x - 4y = 13 is,                         m1 = - coff. of x/coff. of y                           .....

You know nuclear fission means to splits up into two or more parts.

Nuclear fission is the process in which the heavy nucleus of a radioactive atom (like uranium) splits up into smaller nuclei when bombarded with .....

Slope of equation 6x - 5y = 4 is,       m1 = 6/5 Slope of the equation bx - 4y = 9 is,      m2 = b/4 Since these equations are parallel to each other then     m1 = m2 or, 6/5 = b/4 or, b = .....

Renewable resources are resources that can be produced naturally and nonrenewable resources are resources that cannot be replaced. Renewable energy is that energy derived from resources which are not finite. So wind power. & solar power are .....

 Primary energy source are those source of energy  found in nature. Example sun, coal, oil,tidal energy etc.  Secondary energy source are those energy resource that is produced from a primary energy resource using .....

You might have heard that Einstein mass-energy relation. i.e. E = mc2. Here, E = energy m= mass c = speed of light It tells us that mass and energy are .....

No, it is not possible to carry out a controlled nuclear fusion on the earth. The condition for the thermonuclear fusion are : 1.Sufficient amount of hydrogen gas. 2. Very high temperature is needed for the formation of free protons. 3. Pressure .....

Enormous amount of energy is released from sun is due to the Nuclear fusion, process by which nuclear reactions between light elements form heavier elements. In cases where the interacting nuclei belong to elements with low atomic numbers (e.g., .....

The constant stream of light from the sun is the only source of energy that comes from outside the Earth. And its action creates almost all other energy forms available on the planet.

The energy from the sun also gives warmth to the surface of .....

You might have used an solar electricity. It is because the solar radiation is absorbed by solar panel and change into heat and electrical energy. Solar panel is a device which absorb the sunlight as a source of energy and convert into heat and .....

You might have learnt about solar energy. Solar power is energy from the sun that is converted into thermal or electrical energy. Solar energy is the cleanest and most abundant renewable energy source available,

Modern technology can harness .....

Solar panels absorb the sunlights as a source of energy to generate electricity  or .....

A windmill's function is to harness the power of the wind to generate useful energy for humans.  In the past, people used this energy to grind grain or pump water. More modern windmills turn wind energy into electrical .....

Wind is a domestic source of energy.  The nation's wind supply is abundant and inexhaustible. It's a clean fuel source.  Wind energy doesn't pollute the air like power plants. Wind turbines don't produce atmospheric .....

You know wind, wind, tides etc. Do they exhaust from the nature if we use them continously? No, they will not. Renewable sources are those energy sources which are obtained continuously. These sources of energy are formed in a short period of .....

Development is a positive change. In other words, development is the process of dynamic change that is progressive and positive. .....

A radioactive element does not have any stable isotopes, which means it may spontaneously degenerate.  Radioactive elements include uranium, curium and thorium.

The elements that have an atomic number higher than 83 are considered .....

The process involved are  1. Atom bomb - nuclear fission i.e.  Fission is the splitting of a large atom into two or more smaller ones. 2. Hydrogen bomb - nuclear fusion i.e Fusion is the fusing of two or more lighter atoms into a .....

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You may have learnt about fossils. Every plant and animal dies. Plants and animals that dies in ancient times are buried in land due to many natural processes. The remains or imprint of plants or animals preserved or embedded in land (rock) are .....

Average over the entire earth = 164 Watts per square meter over a 24 hour day So the entire planet receives 84 Terrawatts of Power our current worldwide consumption is about 12 .....

The sun emits about 3.86 x 1026 watts of energy. So add 24 zeros to the end of that number, and you’ll get an idea of how unimaginably large an amount of energy that is! Most of that energy goes off into space, but about 1.74 x 1017 watts .....

It states that energy can be neither be created nor be destroyed. It means new energy can't be created  nor can existing energy be destroyed. We can only transform energy from one form to another .....

Now, total area of the figure = area of the rectangle + area of the square.                                               = 10 + .....

You must know that moon revolves around the earth. The time taken by the moon to get one complete revolution around the earth in its orbit is known as sidereal month. It is 27 days 7 hrs 43 minutes 11.5 .....

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The chemical formula for blue vitriol is CuSO4. Blue vitriol is another term for the compound copper(II) sulphate, when the compound is in its pentahydrate state. This substance can also be called bluestone. 3CaO.SiO2 The cement can vary .....

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Moon and earth revolves in same direction. You know, moon revolves from west to east of earth. For lunar eclipse, the earth must be between the moon and the sun such that shadow of the earth falls on the moon. From the figure, you can say .....

When sunlight entering the Earth's atmosphere strikes the particles that are smaller than the light's wavelength, it gets scattered. Colors with shorter wavelengths, for example violet spectrum, are scattered more strongly than those with .....

Also, you  know that the solar eclipse occurs when the moon passes between the sun and earth. Duing this, the moon's shadow completely or partially blocks the sunlight from reaching to the .....