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Ask QuestionPosted by Naina Choudhary. 4 years, 7 months ago
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Posted by Naina Choudhary. 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
Saturated Solution: When a solution cannot dissolve more solute at a given temperature, the point is called saturation point of the solution and solution is called saturated solution. This means, no more solute can be dissolved in a saturated solution at a given temperature.
Posted by Deepak Kashyap 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
The atomicity of ammonia is NH3.Ammonia is a compound of nitrogen and hydrogen with the formula NH3. It is a colourless gas with a characteristic pungent odour. Ammonia contributes significantly to the nutritional needs of terrestrial organisms by serving as a precursor to food and fertilizers.
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Meghna Thapar 4 years, 7 months ago
The motion of the moon around the earth is due to the centripetal force. The centripetal force is provided by the force of attraction of the earth. In our solar system, all the planets go around the Sun which means that there exists a force between the Sun and the planets.
Posted by Subhash Yadav Bharti 4 years, 7 months ago
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Meghna Thapar 4 years, 7 months ago
Rutherford postulated that the atom must contain large empty spaces as most of the α-particles passed through it without getting deflected. Some α-particles were deflected by the foil through small angles, while some were deflected through very large angles. Thus, Rutherford concluded that the positively charged particles in an atom must be concentrated in a very small space.
One out of every 12,000 particles were deflected through 180o showing a full rebound. Thus, Rutherford came to the conclusion that all the positive charges of the atom and most of the mass of the atom is concentrated in a very small volume within the atom.
Rutherford named this small space inside the atom as the nucleus of the atom or the atomic nucleus. On the basis of these observations, Rutherford calculated that the atomic nucleus is 105 times smaller than the total area of the atom. The radius of the atom is 10-8 centimetres while the radius of the nucleus is 10-13 centimetres.
Thus, we can say that the atom is relatively hollow with a heavy nucleus at its centre. The electrons arranged around the nucleus possess negligible mass.
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Dimpal Agrawal 12B 4 years, 7 months ago
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Vimal Patel 4 years, 7 months ago
Yogita Ingle 4 years, 7 months ago
Potential energy = mgh Or
U = mgh
Where m = 50 kg, g = 10 m/s² and h =?
Now, 2gh = v² - u²
2gh = 0 - u²
h = - u²/2g
h = - ( 500 × 500 )/( 2 × - 10 )
h = 25000/2 or 12500 m.
So, U = mgh
= ( 50 )( 10 )( 12500 )
= 6250000 J
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Yogita Ingle 4 years, 7 months ago
Crystallisation is a process used to separates a pure solid in the form of its crystals from a solution. The process involves cooling a hot, concentrated solution of a substance to obtain crystals. Applications of Crystallisation: Purification of common salt obtained from sea water.
Posted by Vinesha Nair 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
Cell organelle : More than 8.7 million species are living on the planet. Every single species are composed of a cell, and it includes both single-celled and multicellular organisms.
The cells provide shape, structure, and carry out different types of functions to keep the entire system active. The cell contains different functional structures which are collectively called as the Organelles, and they are involved in various cellular functions.
Mitochondria : Mitochondria are called as the powerhouses of the cell as they produce energy-rich molecules for the cell. The mitochondrial genome is inherited maternally in several organisms. It is a double membrane-bound, sausage-shaped organelle, found in almost all eukaryotic cells
Lysosomes are sphere-shaped sacs filled with hydrolytic enzymes that have the capability to break down many types of biomolecules. The key function of lysosomes is digestion and removal of waste. Cellular debris or foreign particles are pulled in to the cell through the process of endocytosis. The process of endocytosis happens when the cell membrane falls in on itself (invagination), creating a vacuole or a pouch around the external contents and then bringing those contents into the cell.
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Meghna Thapar 4 years, 7 months ago
A system consisting of a substance distributed as very small particles of a solid, droplets of liquids or tiny bubbles of a gas in a suitable medium is called as dispersion system.
The distributed substance in the solution is called as dispersed phase.
The medium in which the distributed substance is dispersed is referred to as the dispersion medium.
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