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Ask QuestionPosted by Sanjay Dogra 4 years, 4 months ago
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Posted by Nayan Dwivedi 4 years, 4 months ago
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Posted by Sanjay Dogra 4 years, 4 months ago
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Meghna Thapar 4 years, 4 months ago
Plant cells have a cell wall, a large central vacuole, and plastids such as chloroplasts. The cell wall is a rigid layer that is found outside the cell membrane and surrounds the cell, providing structural support and protection. The central vacuole maintains turgor pressure against the cell wall. Cells carry out all the processes of the body including producing and storing energy, making proteins, replicating the DNA, and transportation of molecules through the body. Cells are highly specialized to carry out specific tasks.
Posted by Shivam Kumar 4 years, 4 months ago
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Ritik Varshney 4 years, 4 months ago
Posted by Rashmi Bibyan 4 years, 4 months ago
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Yogita Ingle 4 years, 4 months ago
Here the intermolecular forces of attraction between the particles are identified or mentioned. Since in chalk the particles forces between the chalk particles are not so strong hence they can be easily broken up while the interparticle distance between the particles of iron is strong as there are strong metallic bonds between them. Hence they cannot be easily broken down.
Posted by Mishty Panchal 4 years, 4 months ago
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Meghna Thapar 4 years, 4 months ago
Newton's second law of motion pertains to the behavior of objects for which all existing forces are not balanced. The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. Newton's second law of motion describes the relationship between an object's mass and the amount of force needed to accelerate it. Newton's second law is often stated as F=ma, which means the force (F) acting on an object is equal to the mass (m) of an object times its acceleration (a).
Posted by Baalveer Returns 4 years, 4 months ago
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Posted by Pankaj Gautam 4 years, 4 months ago
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Pankaj Gautam 4 years, 4 months ago
Pankaj Gautam 4 years, 4 months ago
Posted by Jaideep Choudhary 4 years, 4 months ago
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Posted by Nens Raiyani 4 years, 4 months ago
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Meghna Thapar 4 years, 4 months ago
The outer boundary of the cell is called the plasma membrane. The cytoplasm lies inside it. It is a living, thin, delicate, elastic, selectively permeable membrane.
Functions:
- It separates the contents of the cell from its external environment.
- The plasma membrane allows or permits the entry and exit of some materials in and out of the cell.
- It also prevents movement of some other materials.
The cell membrane is called a selectively permeable membrane because it permits the entry and exit of some materials in the cell.
The plasma membrane is flexible and is made up of organic molecules called lipids and proteins. According to fluid mosaic model, plasma membrane is made up of a bilayer of phospholipids. There are two types of protein molecules: Intrinsic Proteins, which completely covers the lipid bilayer and Extrinsic Proteins, which occur either on the outer surface or on the inner surface of the lipid membrane.
The fluid mosaic membrane has been described as “a number of protein icebergs floating in the sea of lipids”.
Posted by Nilesh Agrawal 4 years, 4 months ago
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Posted by Rajib Baruah 4 years, 4 months ago
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Shivanand Bambam 4 years, 4 months ago
Yogita Ingle 4 years, 4 months ago
The food that we eat is broken down to simpler constituents which are then absorbed and utilised by the body. The nutrients are used to release energy whereby the various functions of our body like movement, thinking, maintaining homeostasis etc. can be carried out. In addition we need nutrients for building the various parts of our body, thus enabling the growth and repair of our body.
Posted by Raksha Patwari 4 years, 4 months ago
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Meghna Thapar 4 years, 4 months ago
Additional information can be determined from the slope of the graph. The size of the slope or the gradient of a distance versus time graph gives the speed at which an object is moving. The gradient of a displacement versus time graph indicates an object's velocity. Distance-time graph allows us to understand whether an object is moving with constant speed or variable speed. Distance time graph is very important because by this device we can easily find time taken to cover a certain distance in short time. As in uniform motion, the distance time graph would be a straight line, because the equal distance is covered in equal units of time. ... It is because the slope of a distance-time graph determines the speed of that body, so steeper the slope greater will be the speed of the body.
Posted by Vanshika Vishnoi 4 years, 4 months ago
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Posted by Rakesh Jain 4 years, 4 months ago
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Meghna Thapar 4 years, 4 months ago
Volatility refers to how easily a solute can become a vapor or gas. In general, a substance with a boiling point of less than 100 degrees Celsius (212 degrees Fahrenheit) is volatile, which means it can vaporize. Substances with higher boiling points are nonvolatile. Evaporation is an endothermic phenomenon, i.e. it absorbs heat in order to proceed. Acetone is a volatile solvent (it evaporates easily) so it absorbs much heat when evaporating, and your skin gets colder because of that. Stronger intermolecular forces would make the substance less volatile. As noted in the first response, methanol is more volatile than ethanol. Methanol and ethanol would both have both hydrogen bonding (a relatively strong type of dipole-dipole attraction) and London dispersion forces.
Posted by Siddhi Lavhe 4 years, 4 months ago
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Yogita Ingle 4 years, 4 months ago
The phenomenon of change of gas to liquid is called condensation. For instance, presence of water droplets on surface of glass containing cold water because the water vapour present in air when comes in contact with the cold glass of water it loses its energy and condenses to liquid state. This is seen as water droplets on the surface of glass.
Posted by Kapil Koranga 4 years, 4 months ago
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Yogita Ingle 4 years, 4 months ago
It is difficult for a fireman to hold a hose which ejects large amounts of water at high velocity because the water is pushed forwards and according to Newton's third law it pushes back with equal force.
Posted by Piya Chhabra 4 years, 4 months ago
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Posted by Mahendra Pandey 4 years, 4 months ago
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Yogita Ingle 4 years, 4 months ago
Yes, zero displacement is possible if an object has moved through a distance.
Suppose a ball starts moving from point A and it returns back at same point A, then the distance will be equal to 20 meters while displacement will be zero.
Posted by Jaskomal Zaildar 4 years, 4 months ago
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Kavya Sharma 4 years, 4 months ago
Posted by Monu Kumar 4 years, 4 months ago
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Vaishnavi Tomar 4 years, 4 months ago
Posted by Kajal Sharma 4 years, 4 months ago
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Yogita Ingle 4 years, 4 months ago
The nitrogen cycle is the process by which nitrogen is converted between its various chemical forms.
The features of the nitrogen cycle are-
(i)Nitrogen fixation-Atmospheric nitrogen must be processed, to be used by plants.
(ii)Assimilation-Plants can absorb nitrate or ammonia from the soil via their root hairs. If nitrate is absorbed, it is first reduced to nitrite and then ammonia.
(iii)Ammonification-Bacteria, or fungi in some cases, convert the organic nitrogen into ammonium, a process called ammonification.
(iv)Nitrification-Conversion of ammonia to nitrate is performed primarily by soil-living bacteria and other nitrifying bacteria.
(v)Denitrification- Denitrification is the reduction of nitrates back into the largely inert nitrogen gas, completing the nitrogen cycle which is performed by Clostridium in anaerobic conditions.
Posted by Kajal Sharma 4 years, 4 months ago
- 1 answers
Yogita Ingle 4 years, 4 months ago
he nitrogen cycle is the process by which nitrogen is converted between its various chemical forms.
The features of the nitrogen cycle are-
(i)Nitrogen fixation-Atmospheric nitrogen must be processed, to be used by plants.
(ii)Assimilation-Plants can absorb nitrate or ammonia from the soil via their root hairs. If nitrate is absorbed, it is first reduced to nitrite and then ammonia.
(iii)Ammonification-Bacteria, or fungi in some cases, convert the organic nitrogen into ammonium, a process called ammonification.
(iv)Nitrification-Conversion of ammonia to nitrate is performed primarily by soil-living bacteria and other nitrifying bacteria.
(v)Denitrification- Denitrification is the reduction of nitrates back into the largely inert nitrogen gas, completing the nitrogen cycle which is performed by Clostridium in anaerobic conditions.
Posted by Tisha Kumar 4 years, 4 months ago
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Posted by Siddhi Ranjan 4 years, 4 months ago
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Kavya Sharma 4 years, 4 months ago
Posted by Kashmir Singh 4 years, 4 months ago
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Yogita Ingle 4 years, 4 months ago
Matter changes from one state to another by change in temperature and pressure. For e.g. solids on heating changes to liquid, liquid on further heating changes to gases. In same manner gases on compression means on applying pressure changes to liquid again.
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Insha Fatima 4 years, 4 months ago
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