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Ask QuestionPosted by ??????? ? 6 years ago
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Posted by Sakshi Gupta 6 years ago
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Yogita Ingle 6 years ago
Energy can neither be created nor be destroy but change into one form to other.
This principle works in a hydropower plant. When water falls on the turbine, the stored potential energy is converted into the kinetic energy.
This principle works in a hydropower plant. When water falls on the turbine, the stored potential energy is converted into the kinetic energy.
Posted by Sakshi Gupta 6 years ago
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Sambhav Maheshwari 6 years ago
Posted by Kuldeep Rajput 6 years ago
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Yogita Ingle 6 years ago
Parthenocarpy is the process of producing or developing fruits without the process of pollination and fertilization. There are two types of Parthenocarpy – naturally and artificially. The fruits produced by this process are seedless. Banana, Cucumber, Grapes, Lemon Tomato, and Watermelon are a few examples of seedless fruits which have been produced by Parthenocarpy process.
Posted by Fåï Êz 6 years ago
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Sakshi Gupta 6 years ago
Posted by ? ... 6 years ago
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Abhinav Suri 6 years ago
Yogita Ingle 6 years ago
Geothermal energy is basically produce from the earth. Temperature below the earth surface is very large compare to other places, It can be happen due to other reason. This heat from earth mantle can be use to produce heat.
Cold water is sent through pipes in the heated area of earth mantle and the water gets heated up due to high temperature. Steam produced from this procedure can be use to rotate turbine which can produce electricity.
Posted by Sahil Sehrawat 6 years ago
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Posted by Kajal Kajal 6 years ago
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Yogita Ingle 6 years ago
In the nervous system, a synapse is a structure that permits a neuron (or nerve cell) to pass an electrical or chemical signal to another cell (neural or otherwise). The synapse contains a small gap separating neurons
Oshi Shăřmã 6 years ago
Posted by Himanshu Nahar 6 years ago
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Yogita Ingle 6 years ago
Homologous Organs : Homologous organs have same origin & anatomical structure but perform different functions. Presence of homologous organs among organisms tells that there existed a common ancestor for them from whom this structure was inherited by them. Homologous organs show the closeness of organisms. The more homologous organs they have, more recently they had a common ancestor. Homologous organs exhibit divergent evolution.
Eg : Forelimb of Humans & Wings of Bat
Analogous Organs : Analogous organs have different origin & anatomical structure but have same function. They exhibit convergent evolution. This means that the organisms evolved from a common ancestor long ago which do not have the organ. Analogous organs were independently developed by the organisms after separation from the ancient ancestor. For instance, birds, insects & bats have evolved from an ancient common ancestor without wings. Their wings were developed separately in each lineage after diverging from ancestor.
Eg : Wings of Bat & Wings of Birds
Posted by Tushar Khatri 6 years ago
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Rani Mishra ??? 6 years ago
Posted by Husita Patel 6 years ago
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Yogita Ingle 6 years ago
When copper or silver combines with oxygen, the process is known as corrosion or oxidation.
When copper reacts with oxygen, then it produces copper oxide. The chemical equation of this reaction is
4Cu + O2 → 2Cu2O, and forms Copper Oxide.
Silver objects corrode slowly in the air due to the presence of H2S in the air. The chemical equation of this reaction is 2Ag + O2 → Ag2O.
Posted by Husita Patel 6 years ago
- 4 answers
Yogita Ingle 6 years ago
Efflorescence is the loss of water (or a solvent) of crystallization from a hydrated or solvated salt to the atmosphere on exposure to air.
Efflorescence means "to flower out" in French is the migration of a salt to the surface of a porous material, where it forms a coating. The essential process comprises the dissolving of an internally held salt in water, or occasionally in another solvent. The water, with the salt now held in solution, migrates to the surface, then evaporates, leaving a coating of the salt.
Example is Gypsum (CaSO4.2H2O) is a hydrate solid that, in a sufficiently dry environment, will give up its water to the gas phase and forms anhydrite (CaSO4).
? ... 6 years ago
Posted by Suvarna Walte 6 years ago
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Yogita Ingle 6 years ago
Urine formation is carried out by the excretory system. The nephrons play a major role in this. They carry out urine formation in various steps like glomerular filtration, selective reabsorption and tubular secretion.
1. Each nephron has a glomerulus, the site of blood filtration. The glomerulus is a network of capillaries surrounded by a cuplike structure, the glomerular capsule (or Bowman’s capsule). As blood flows through the glomerulus, blood pressure pushes water and solutes from the capillaries into the capsule through a filtration membrane. This glomerular filtration begins the urine formation process.
2. Inside the glomerulus, blood pressure pushes fluid from capillaries into the glomerular capsule through a specialized layer of cells. This layer, the filtration membrane, allows water and small solutes to pass but blocks blood cells and large proteins. Those components remain in the bloodstream. The filtrate flows from the glomerular capsule further into the nephron.
3. The resulting filtrate contains waste, but also other substances the body needs: essential ions, glucose, amino acids, and smaller proteins. When the filtrate exits the glomerulus, it flows into a duct in the nephron called the renal tubule
4. Waste ions and hydrogen ions pass from the capillaries into the renal tubule. This process is called secretion. The secreted ions combine with the remaining filtrate and become urine. The urine flows out of the nephron tubule into a collecting duct. It passes out of the kidney and down to the bladder.
Urine is a liquid or water waste product that passes through your urinarytract and is expelled from your body through your urethra. It contains 90-95% water.
Posted by Vijay Rathore??? 6 years ago
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M -Chikmon 6 years ago
Posted by Vijay Rathore??? 6 years ago
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Posted by Anil Solanke 6 years ago
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Yogita Ingle 6 years ago
Plaster of Paris is prepared by heating gypsum at 373 K. On heating, it loses water molecules and becomes calcium sulphate hemihydrate (CaSO4.1/2 H2O) which is called Plaster of Paris.
Plaster of Paris was first widely used in Paris, and it became the center of plaster production. Thus it got its name.
9000 years ago houses are made of woods, in order to protect them from fire, a coating of plaster was made on the walls.
First, this application of POP was started in Paris and it became the center of plaster production, thus it is known as Plaster of Paris.
Posted by Amar Arpit 6 years ago
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Posted by Abhinav ? 6 years ago
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Shreya ... 6 years ago
Posted by Shikha Sharma 6 years ago
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Posted by Rahul Sharma 6 years ago
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Posted by Tanya Singh 6 years ago
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Khushi Rathore 6 years ago
Posted by Tanya Singh 6 years ago
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Yogita Ingle 6 years ago
In Mendeleev’s periodic table, the elements are arranged in the increasing order of their atomic masses but some pairs of elements were placed such that elements with higher atomic masses were placed prior to those with lower atomic masses.
Example:
Ar (Z = 18, At. Wt. = 40) precedes K (Z = 19, At.wt. = 39.0)
Te (Z = 52, At.wt. = 127.6) precedes I (Z = 53, At.wt = 126.9)
Co (Z = 27, At. Wt. = 59.9) precedes Ni (Z = 28, At.wt. = 58.6)
Th (Z = 90, At. Wt. = 232.12) precedes Pa (Z = 91, At.wt. = 231)
Mendeleev has to arrange these elements in this order inevitably since otherwise by reversing their position they would fall into the groups with elements having altogether different properties.
Posted by Tanya Singh 6 years ago
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Khushi Rathore 6 years ago
Yogita Ingle 6 years ago
The addition of hydrogen to unsaturated hydrocarbon in the presence of catalyst is called hydrogenation. Unsaturated hydrocarbons add hydrogen in the presence of catalysts such as palladium or nickel to give saturated hydrocarbons. For example hydrogenation of alkene in presence of nickel catalysts.
Industrial application: Vegetable oils have long unsaturated carbon chains. These on hydrogenation in the presence of nickel catalyst form saturated carbon chains which are animals fats or ghee. Thus ghee on industrial scale is made by hydrogenation of naturally available vegetable oils.
Uday Chauhan 6 years ago
Posted by Yash Gupta 6 years ago
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Yogita Ingle 6 years ago
Francium is a earth metal which is highly radioactive; its longest-lived isotope 223Fr has a half-life of only 21 minutes.
Posted by Rama Bhati 6 years ago
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Posted by Rishi Raj 6 years ago
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Posted by Priyanshu Jha 6 years ago
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Yogita Ingle 6 years ago
The name of the element with given atomic numbers are:
X = 2 = Helium
Y = 6 = Carbon
Z = 10 = Neon
When these elements are located in periodic table,
Helium (X) is present in 18th group and 1st period.
Carbon (Y)is present in 14th group and 2nd period.
Neon (Z) is present in 18th group and 2nd period.
From the above data, it can be inferred that elements such as Helium (X) and Neon (Z) belong to same group (18), whereas elements such as Carbon (Y) and Neon (Z) belong to same period (2).
Posted by Subhash Chand 6 years ago
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Khushi Rathore 6 years ago
Yogita Ingle 6 years ago
Fossils are dead remains of animals and plants from remote past.
Fossils are formed when dead organisms are not completely decomposed. The organisms may get trapped in resins of tree, lava of volcanoes or hot mud, which when hardens retains the animal’s parts thus forming fossils.
Two methods of determining the age of fossils are:
- Relative method: By estimating the age of the layer of earth’s crust where the fossil is found. Fossils near the surface are recent and those in the deeper layers are more ancient.
- Radio-carbon dating method: By detecting the ratios of different isotopes of carbon in the fossils.
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Yogita Ingle 6 years ago
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