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Ask QuestionPosted by Aparna Singh 5 years, 7 months ago
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Meghna Thapar 5 years, 7 months ago
When salt is mixed with water, the salt dissolves because the covalent bonds of water are stronger than the ionic bonds in the salt molecules. Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that held them together.
Posted by Aparna Singh 5 years, 7 months ago
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Meghna Thapar 5 years, 7 months ago
Diffusion is nothing but the movement of molecules from it's higher concentration to lower concentration. The zig-zag movement of small particles suspended in a liquid or a gas is called Brownian motion. Brownian motion tells us that the particles are tiny nature and the particles of a matter are constantly moving.
Posted by Kanak Verma 5 years, 7 months ago
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Meghna Thapar 5 years, 6 months ago
Estimation is often done by sampling, which is counting a small number of examples something, and projecting that number onto a larger population. An example of estimation would be determining how many candies of a given size are in a glass jar. In real life, estimation is part of our everyday experience. For students, estimating is an important skill. First and foremost, we want students to be able to determine the reasonableness of their answer. Without estimation skills, students aren't able to determine if their answer is within a reasonable range.
Posted by Rakesh Pandey 5 years, 7 months ago
- 3 answers
Yogita Ingle 5 years, 7 months ago
It is one of the fundamental quantities in Physics and the most basic property of matter. We can define mass as the measure of the amount of matter in a body. The SI unit of mass is Kilogram (kg).
Posted by Chowdhury Farath 5 years, 7 months ago
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Meghna Thapar 5 years, 7 months ago
The difference between the rough endoplasmic reticulum and the smooth endoplasmic reticulum is that the rough endoplasmic reticulum contains ribosomes. The smooth endoplasmic reticulum does not contain ribosomes. The ribosomes are what give rough endoplasmic reticulum its characteristic "roughness."
Posted by Anil Bhardwaj 5 years, 7 months ago
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Chowdhury Farath 5 years, 7 months ago
Posted by Nonglemba Singha 5 years, 7 months ago
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Jeslin Anna Jacob? 5 years, 7 months ago
Posted by Reeva Gusain 5 years, 7 months ago
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Meghna Thapar 5 years, 7 months ago
The three scientists that contributed to the development of cell theory are Matthias Schleiden, Theodor Schwann, and Rudolf Virchow. A component of the cell theory is that all living things are composed of one or more cells. A component of the cell theory is that the cell is the basic unit of life.
Posted by Prwg Fehns 5 years, 7 months ago
- 3 answers
Posted by Jashan Deep 5 years, 7 months ago
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Posted by Karan Karan 5 years, 7 months ago
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Meghna Thapar 5 years, 7 months ago
Sugar is a compound. It has the chemical formula: C12H22O11. It is a carbon compound and carbon forms covalent compounds (compounds formed by the sharing of electrons between the elements) . So it is not a mixture as the elements (C,O,H) react chemically and are not physically mixed with each other .
Posted by Anu Radha 5 years, 7 months ago
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Posted by Ramneek Kaur 5 years, 7 months ago
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Love Grewal 5 years, 7 months ago
Posted by Namya Goyal 5 years, 7 months ago
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Meghna Thapar 5 years, 7 months ago
All gases at the same temperature have the same kinetic energy. This means that lighter gases move faster than heavy gases at the same temperature. In formula sense, kinetic energy of a gas is given by: Since they are equal KE, and the heavier gas has more mass, the velocity of the heavier gas must be lower.
Posted by Varinda Sharma 5 years, 7 months ago
- 1 answers
Meghna Thapar 5 years, 7 months ago
- Nucleoid is an undefined nuclear region of the prokaryotic cell, containing the genetic material (nucleic acids).
- Chromosomes are thread-like condensed chromatin fibres which contain heredity information and are visible only during cell division.
- A chromatid is one half of a replicated chromosome. Prior to cell division, chromosomes are copied and identical chromosome copies join together at their centromeres. Each strand of one of these chromosomes is a chromatid.
- Chromatin is a substance within a chromosome consisting of DNA and protein. The DNA carries the cell's genetic instructions. The major proteins in chromatin are histones, which help package the DNA in a compact form that fits in the cell nucleus.
Posted by Arpana Bharti 5 years, 7 months ago
- 2 answers
Yogita Ingle 5 years, 7 months ago
During evaporation process the particles of liquid gain energy from their surroundings in order to overcome the force of attraction between them. This causes loss of heat energy in the surroundings that is why evaporation causes cooling.
Posted by Yogesh Kumar Chauhan 5 years, 7 months ago
- 2 answers
Meghna Thapar 5 years, 7 months ago
A compound microscope uses two lenses to magnify the object/specimen being viewed (near the stage of the microscope). These two lenses include the objective lens and the eyepiece lens (also known as the ocular lens).
Meghna Thapar 5 years, 7 months ago
Ordinary light microscopes are equipped with three objective lenses (5 ×/10 ×, 40 ×, and 90/100 ×), and two ocular (5 ×, 10 ×) lenses. The ocular lens, or eyepiece lens, is the one that you look through at the top of the microscope. The purpose of the ocular lens is to provide a re-magnified image for you to see when light enters through the objective lens. The ocular lens is generally 10- or 15-times magnification.
Posted by Rahul Kumar 5 years, 7 months ago
- 1 answers
Jagdeep Kaur 5 years, 7 months ago
Posted by Vansh Sharma 5 years, 7 months ago
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Yogita Ingle 5 years, 7 months ago
The three features found in almost every cell are plasma membrane, nucleus and cytoplasm.
Posted by Bharat Sharma 4 years, 7 months ago
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Sia ? 4 years, 7 months ago
Posted by Sreedevi Bandi 5 years, 7 months ago
- 2 answers
Yogita Ingle 5 years, 7 months ago
Sublimation is the property of substance in which they are converted directly from solid to gas or vice versa. Such substances are known as sublime. Some examples of solids which sublime are ammonium chloride, camphor, naphthalene and anthracene. Let us perform an activity to separate a mixture of ammonium chloride and salt.
Take a mixture of ammonium chloride and salt in a china dish cover it inverted conical transparent funnel. At the other end of the funnel put a cotton plug so that vapour could not come out. Now place china dish on a burner. As the ammonium chloride is sublime after heating it will directly converted into vapour and this vapour will again condense at the upper colder part of funnel to form solid ammonium chloride. In this way the mixture ammonium chloride and salt can be separated by the sublimation method.
Posted by Prajeet Ganesh 5 years, 7 months ago
- 2 answers
Yogita Ingle 5 years, 7 months ago
A non-membranous cell organelle is ribosome. Ribosomes are extremely small, round bodies found either in the free state in the cytoplasm or attached to the surface of the ER. They are composed of ribonucleoproteic (ribonucleic acid and protein). The main function of ribosomes is to act as a platform for the synthesis of proteins.
Posted by Shubham Saini 5 years, 7 months ago
- 5 answers
Pragya Bhujel 5 years, 7 months ago
Posted by Ridhima Shekhawat 5 years, 7 months ago
- 1 answers
Yogita Ingle 5 years, 7 months ago
Below is given the contrast between the Himalayan region with that of the Peninsular plateau.
The Himalayan region |
Peninsular plateau |
| 1. It consists of the loftiest mountains and deep valleys. | 1. It consists of broad and shallow valleys and rounded hills. |
| 2. It is formed due to the collision of the Indo-Australian and Eurasian plates. | 2. It is formed due to the breaking and drifting of the Gondwana land. |
| 3. In the Himalayan region we find the highest mountains of the world. | 3. We don't find very high peaks in the Peninsular Plateau. |
| 4. It is formed at the edge of the Indo-Gangetic plain. | 4. It is formed at the edge of the Deccan Plateau. |
| 5. There are many well-known hill-stations found in the Himalayan region. Examples are: Shimla, Mussoorie, Darjeeling, etc. | 5. No well-known hill station is found in the Peninsular Plateau. |
| 6. The Himalayan region contains only a few minerals. | 6. The Peninsular Plateau is the storehouse of the minerals. |
| 7. The rivers that originate from the Himalayas are perennial. | 7. The rivers that originate from plateau are seasonal in nature. |
Posted by Kuldeep Pal 5 years, 7 months ago
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Swapna Rai 5 years, 7 months ago
Posted by Mohit Yadav 5 years, 7 months ago
- 0 answers
Posted by Lakshay Upneja 5 years, 7 months ago
- 1 answers
Yogita Ingle 5 years, 7 months ago
| Evaporation | Boiling |
|
Evaporation is a normal process that occurs when the liquid form changes into the gaseous form; while causing an increase in the pressure or temperature. |
Boiling is an unnatural process where the liquid gets heated up and vapourized due to continuous heating of the liquid. |
|
Evaporation usually occurs on the surface of the liquid being heated up. |
Boiling usually occurs on the entire mass of the liquid that gets heated up. |
|
Bubbling effect is not visible in Evaporation. |
Bubbling effect is visible during the process of Boiling. |
|
The process of Evaporation is usually a slow and carried out process when compared to Boiling. |
The process of Boiling is usually much quicker and the process happens quite rapidly as well. |
Posted by Ishika Gupta 5 years, 7 months ago
- 1 answers
Yogita Ingle 5 years, 7 months ago
| Real Image | Virtual Image |
| The image is due to reflection or refraction, when the light arises from an object and converges to a certain point | The image produced when the light arising from an object appears to strike a certain point |
| The real image can be captured on screen as it is the result of actual intersection of ray of light | It cannot be captured on a screen as it is the imaginary intersection of ray of light |
| The images are inverted | The images are erect |
| Converging lens are used to produce the image | Diverging lens are used to produce the image |
| Concave mirror is used to produce the image | A plane mirror or convex mirror is used to produce the image |
Posted by Sakshi Chaudhary 5 years, 7 months ago
- 1 answers
Yogita Ingle 5 years, 7 months ago
Since the heat is used to overcome the force of attraction, the temperature of the substance does not change. The heat energy absorbed in this case is called as the latent heat. The temperature of the substance remains equal to the latent heat provided to or released by it. That's why for any substance, the temperature remain constant during the change of state.
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Arpana Bharti 5 years, 7 months ago
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