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Ask QuestionPosted by Aditya Thapa 3 years, 10 months ago
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Posted by Vallabhanani Chethan 3 years, 10 months ago
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Tanisha Mittal 3 years, 10 months ago
Yogita Ingle 3 years, 10 months ago
A polyatomic ion, also known as a molecular ion, is a charged chemical species(ion) composed of two or more atoms covalently bonded or of a metal complex that can be considered to be acting as a single unit.
Eg: SO42−, CO32−.
Posted by Sk Maru 3 years, 10 months ago
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Maheshwari N C Chandra Babu N A 3 years, 10 months ago
Suchitra Sen 3 years, 10 months ago
Posted by Pancham Sharma Kungar 3 years, 10 months ago
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Posted by Jeevitha R 3 years, 10 months ago
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Maheshwari N C Chandra Babu N A 3 years, 10 months ago
Yogita Ingle 3 years, 10 months ago
Work: When a force acts on an object and the object shows displacement, the force has done work on the object.
Two conditions need to be satisfied for work to be done:
(i) A force should act on object
(a) The object must be displaced
Work = Force x Displacement Unit of workdone = Joule = Newton x metre 1 Joule work is said to be done when 1 Newton force is applied on an object and it shows the displacement by 1 meter.
Energy
The capacity of a body to do work is called the energy of the body.
Unit of energy = Joules 1KJ = 1000 J
Forms of Energy: The various forms of energy are potential energy, kinetic energy, heat energy, chemical energy, electrical energy and light energy.
Posted by Maya Dariyani 3 years, 10 months ago
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Vinay Khattar 3 years, 10 months ago
Yogita Ingle 3 years, 10 months ago
The ozone layer depletion is a major concern and is associated with a number of factors. The main causes responsible for the depletion of the ozone layer are listed below:
Chlorofluorocarbons: Chlorofluorocarbons or CFCs are the main cause of ozone layer depletion. These are released by solvents, spray aerosols, refrigerators, air-conditioners, etc.
The molecules of chlorofluorocarbons in the stratosphere are broken down by the ultraviolet radiations and release chlorine atoms. These atoms react with ozone and destroy it.
Unregulated Rocket Launches: Researches say that the unregulated launching of rockets result in much more depletion of ozone layer than the CFCs do. If not controlled, this might result in a huge loss of the ozone layer by the year 2050.
Nitrogenous Compounds: The nitrogenous compounds such as NO2, NO, N2O are highly responsible for the depletion of the ozone layer.
Posted by Surjeet Mohanty 3 years, 10 months ago
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Gaurav Seth 3 years, 10 months ago
Suberin: It is a waxy substance that is found in the cell wall of higher plants. It helps in the control and regulation of movement of solutes through to the xylem. Lignin: It is an organic compound that binds to cellulose and forms the chief part of woody tissue. It is also found in the secondary cell walls of xylem, fibres, sclereids. Lignin is a hard substance with great tensile and compressional strength which means that it does not break and deform easily. Cutin: It is a wax like, water repellent material that is present on the surface of the plants. It prevents water loss form the desert plants.
Posted by Charitha Bhaskar..... ???? 3 years, 10 months ago
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Gaurav Seth 3 years, 10 months ago
| INTENSIVE | EXTENSIVE |
| Independent property | Dependent property |
| Size does not change | Size changes |
| It cannot be computed | It can be computed |
| Can be easily identified | Cannot be easily identified |
| Example: melting point, colour, ductility, conductivity, pressure, boiling point, lustre, freezing point, odour, density, etc | Example: length, mass, weight, volume |
Posted by Komal Rathore 3 years, 10 months ago
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Maheshwari N C Chandra Babu N A 3 years, 10 months ago
Omkar Darekar 3 years, 10 months ago
Gaurav Seth 3 years, 10 months ago
| Momentum is a vector quantity as it the tendency of a body to remain in motion. |
| Momentum is denoted as ‘p’. |
| The momentum of a body of mass ‘m’ moving with a velocity of ‘v’ is calculated as p=m×v |
| Linear momentum and angular momentum are the two types of momentum. |
| Momentum depends on mass and velocity. |
| The total momentum is conserved. |
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| Inertia is a scalar quantity as it is the resistance offered by the body to move. |
| Inertia is denoted as ‘I’. |
| The inertia cannot be calculated using a formula. |
| The inertia of rest, inertia of motion, and inertia of direction are the three types of inertia. |
| Inertia depends only on mass. |
| Inertia has nothing to do with the conservation of energy. |
Yogita Ingle 3 years, 10 months ago
- Inertia is the natural tendency of an object to resist a change in its state of motion or of rest.
- The mass of an object is a measure of its inertia.
Law of conservation of momentum states that For two or more bodies in an isolated system acting upon each other, their total momentum remains constant unless an external force is applied. Therefore, momentum can neither be created nor destroyed.
Posted by Komal Rathore 3 years, 10 months ago
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Gaurav Seth 3 years, 10 months ago
In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.
Posted by Surbhi Singh 3 years, 10 months ago
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Radha Madhav 3 years, 10 months ago
Gaurav Seth 3 years, 10 months ago
What type of mixtures are separated by the technique of crystallization?
A n s w e r:
Homogeneous mixtures such as common salt solution and copper sulphate solution separated by technique of crystallization.
Posted by Waseemansari Waseemansari 3 years, 10 months ago
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Gaurav Seth 3 years, 10 months ago
Graphite
1) Graphite is soft and slippery because there are only weak intermolecular forces between its layers. Graphite is a good conductor of heat and electricity.
2) Graphite can conduct electricity because of the delocalised (free) electrons in its structure.
3) These arise because each carbon atom is only bonded to 3 other carbon atomsHowever, in diamond, all 4 outer electrons on each carbon atom are used in covalent bonding, so there are no delocalised electrons.
4) These electrons in graphite are free to move through the structure.
Yogita Ingle 3 years, 10 months ago
Non-metals are elements that generally cannot conduct electricity. They are the second-largest class of elements after metals. Carbon is the only non-metal which conducts electricity. It is classified as a semi-metal when it is in the form of graphite. In a graphite molecule, one valence electron of each carbon atom remains free, Thus making graphite a good conductor of electricity. Whereas in diamond, they have no free mobile electron. Hence, there won’t be a flow of electrons That is the reason behind the diamond is bad conductor electricity.
Posted by Sk Maru 3 years, 10 months ago
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Yogita Ingle 3 years, 10 months ago
Interconversion of three states of matter: Any state of matter can be converted into other state with the help of temperature or pressure. Different terminology for the Interconversion of states of matter is given below:
(i) Solid to Liquid: Fusion
(ii) Liquid to Gas: Vaporisation
(iii) Gas to liquid: Condensation
(iv) Liquid to Solid: Solidification
(v) Solid to Gas: Sublimation
(vi) Gas to Solid: Sublimation
Observe the following diagram to memorise this Interconversion states of matter:
Gargi Pandey 3 years, 10 months ago
Posted by Sunil Kumar 3 years, 10 months ago
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Posted by Bhabhor Dhaval 3 years, 10 months ago
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Sk Maru 3 years, 10 months ago
Gaurav Seth 3 years, 10 months ago
the plants of a particular region or period, listed by species and considered as a whole. a work systematically describing such plants. plants, as distinguished from fauna. the aggregate of bacteria, fungi, and other microorganisms normally occurring on or in the bodies of humans and other animals: intestinal flora.
Yogita Ingle 3 years, 10 months ago
The term flora in Latin means “Goddess of the Flower.” Flora is a collective term for a group of plant life found in a particular region. The whole plant kingdom is represented by this name.
Flora is classified and differentiated based on many factors. The best one among them is the area in which they grow or are found. Some grow in desert regions or in water, some are found in hilly areas while some are endemic to a specific geographic location.
According to the place at which they grow, they have adaptations also. For example, Cactus plants are naturally seen in deserts. They have adaptations like modified leaves or prickles to preserve water and protect themselves from predators.
The agricultural flora consists of plants cultivated by men for their use. Horticulture is the practice of growing ornamental and decorative flowers which are also known as garden flora.
Posted by Sagar Tiwari 3 years, 10 months ago
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Yogita Ingle 3 years, 10 months ago
| Sl. No. | Differentiating Property | Distance | Displacement |
| 1 | Definition | The complete length of the path between any two points is called distance. | Displacement is the direct length between any two points when measured along the minimum path between them. |
| 2 | Denotation | d | s |
| 3 | Direction Consideration | To calculate distance, the direction is not considered. | To calculate displacement, the direction is taken into consideration. |
| 4 | Quantity | Distance is a scalar quantity as it only depends upon the magnitude and not the direction. | Displacement is a vector quantity as it depends upon both magnitude and direction. |
| 5 | Route Information | Distance gives the detailed route information that is followed while travelling from one point to another. | As displacement refers to the shortest path, it does not give complete information on the route. |
| 6 | Formula | Speed × Time | Velocity × Time |
Aditya Singh 3 years, 10 months ago
Posted by Rajat Goenka 3 years, 10 months ago
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Surjeet Mohanty 3 years, 10 months ago
Sk Maru 3 years, 10 months ago
Posted by Sujal Kumar 3 years, 10 months ago
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Yogita Ingle 3 years, 10 months ago
Rest: An object is said to be at rest if it does not change its position with respect to its surroundings with time.
E.g. A table lying in a room is at rest with respect to the walls of the room.
Motion: An object is said to be in motion if the position changes with respect to it surrounding and time.
E.g., A car running on the road is in motion with respect to the lamp posts, trees or bus stop on the roadside
Posted by Shiva Parihar 3 years, 10 months ago
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Tanisha Mittal 3 years, 10 months ago
Dev Sharma 3 years, 10 months ago
Yogita Ingle 3 years, 10 months ago
Neutrons are subatomic particles that are one of the primary constituents of atomic nuclei. They are usually denoted by the symbol n or no. Neutrons do not have any net electric charge associated with them. They do, however, have mass which is slightly greater in magnitude than that of a proton. Neutrons and protons are collectively referred to as nucleons
Posted by Archana Swain 3 years, 10 months ago
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Subham Parida 3 years, 10 months ago
Posted by Dev Verma 3 years, 10 months ago
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Zainab Khan 3 years, 10 months ago
Yogita Ingle 3 years, 10 months ago
Velocity-Time Relation
- A car having initial velocity u , is being subjected to a uniform acceleration a for a time period of t , after the time t the final velocity of the car is v.
- Now we need to find the relation between v,u,a,t graphically.
Position-Time Relation
- A car having initial velocity u , is being subjected to a uniform acceleration a for a time period of t , after the time t the final velocity of the car is v.
- In the time interval of time t , it covers a distance of s.
- Now we need to derive relation between s,u,a,t graphically.
Position–Velocity Relation
- A car having initial velocity u , is being subjected to a uniform acceleration a for a time period of t , after the time t the final velocity of the car is v.
- In the time interval of time t , it covers a distance of s.
- Now we need to find relation between s,u,v,a graphically.
Posted by Arushi Sharma 3 years, 10 months ago
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Yogita Ingle 3 years, 10 months ago
(i) The body functions are damaged drastically and may never recover completely if not cared.
(ii) The treatment will take time, which means that someone suffering from a disease is likely to be bed-ridden for sometime.
(iii) The person suffering from an infectious disease can serve as a source from where the infection may further spread to other people.
Posted by Vishnu Priya K 3 years, 10 months ago
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Suchitra Sen 3 years, 10 months ago
Posted by Shivangi Singh 3 years, 10 months ago
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Posted by Shivangi Singh 3 years, 10 months ago
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Posted by Movva Sanju 3 years, 10 months ago
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Gaurav Seth 3 years, 10 months ago
The system is suspended in the stroma. It is a collection of membranous sacs called thylakoids. The green coloured pigments called chlorophyll are found in the thylakoid membranes. It is the sight for the process of light-dependent reactions of the photosynthesis process. The thylakoids are arranged in stacks known as grana and each granum contains around 10-20 thylakoids
Posted by Tapasvi Sangwan 3 years, 10 months ago
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Gaurav Singh 3 years, 10 months ago
Arpit Bareth 3 years, 10 months ago
ಮಮತಾ ಡಿ ಮಮತಾ ಡಿ 3 years, 10 months ago
ಮಮತಾ ಡಿ ಮಮತಾ ಡಿ 3 years, 10 months ago
Posted by Arrun Raamanathan 3 years, 10 months ago
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Arpit Bareth 3 years, 10 months ago
Yogita Ingle 3 years, 10 months ago
The work done on a body moving in a circular path is also zero. This is because, when a body moves in a circular path, then the centripetal force acts along the radius of the circle, and it is at right angles to the motion of the body. Thus, the work done in the case of moon moving round the earth is also zero.
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Frooty Hems 3 years, 10 months ago
1Thank You