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Ask QuestionPosted by Sanchita Chavan 5 years, 5 months ago
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Posted by Sanchita Chavan 5 years, 5 months ago
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Meghna Thapar 5 years, 5 months ago
Combination reactions are always exothermic. For example barium metal and fluorine gas will combine in a highly exothermic reaction to form the salt barium fluoride: Another example is given by magnesium oxide combining with carbon dioxide: Often, reaction can fall into more than one category. Most of the combination reactions are exothermic but not all the combination reactions are exothermic similarly most of the decomposition reactions are endothermic but not not all the reactions are endothermic. For Example oxidation of hydrocarbons is exothermic.
Posted by Sanchita Chavan 5 years, 5 months ago
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Pranali Solanke 5 years, 5 months ago
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Posted by Mahi..... ♾ 5 years, 5 months ago
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Prakhar Mishra 5 years, 5 months ago
Divyansh Vashishtha 5 years, 5 months ago
Posted by Mahi..... ♾ 5 years, 5 months ago
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Gaurav Seth 5 years, 5 months ago
Linear magnification produced by a spherical mirror is the ratio of the size of the image formed by the mirror so that of the size of the object.
⇒ m= I / O
where, I = Image size
And, O = Object size
It asically tells how big or small an image is when compared to the size of the corresponding object. The size or dimensions are measured as either height or length.
Posted by Rohan Kumar 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Lithium, sodium and potassium are all soft metals that are easily cut with a scalpel or knife.
Posted by Priyanshu 12 5 years, 5 months ago
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Bryanjot Kaur 5 years, 5 months ago
Sweta Jha 5 years, 5 months ago
Vaishnavi Gupta 5 years, 5 months ago
Posted by Rohan Kumar 5 years, 5 months ago
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Tvisha Sanghvi 5 years, 5 months ago
Bitu Sahu 5 years, 5 months ago
Posted by Yash Patel 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Transpiration is the biological process by which water is lost in the form of water vapour from the aerial parts of the plants.
The significance of transpiration is explained below:
- Transpiration helps in the conduction of water and minerals to different parts of the plants.
- Due to the continuous elimination of water from the plant body, there is a balance of water maintained within the plant.
- It maintains osmosis and keeps the cells rigid.
- A suction force is created by transpiration that helps in the upward movement of water in the plants.
- Certain hydrophilic salts are accumulated on the surface of the leaves, which keeps the leaves moist.
- It maintains the turgidity of the cells and helps in cell division.
- Optimum transpiration helps in the proper growth of the plants.
- The cooling effect of a tree is due to the evaporation of water from its leaves.
Posted by Riyana D'Cunha 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Using the lens formula; -1/u+1/v=1/f
rearranging, 1/v=1/18-1/27=1/54
hence 1/v=1/54.
To get the position of the image, V, find the reciprocal of 1/54.
Hence, v=54cm.
To obtain the size and nature of image,
use magnifcation formula; hi=V/u*h=54/-27*4=-8.0cm.
Therefore, size of image is 8cm.
Nature=virtual image.
Posted by Sneha Tomar 5 years, 5 months ago
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Posted by Shivaji Matane 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
The gravitational force is responsible for the stability of the universe.
Posted by Surya Sunny 5 years, 5 months ago
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Gaurav Seth 5 years, 5 months ago
The image is located at a distance of 22.5 cm from the mirror or lens.
Explanation:
It is given that,
Height of the object, h = 2 cm
Height of the image, h' = -3 cm (real image)
Object distance, u = -15 cm
We need to find the position of the image. It is given by the concept of magnification. It is given by :
v = 22.5 cm
So, the image is located at a distance of 22.5 cm from the mirror or lens.
Posted by Rushikesh Phapale 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Cell division happens when a parent cell divides into two or more cells called daughter cells. Cell division usually occurs as part of a larger cell cycle. All cells reproduce by splitting into two, where each parental cell gives rise to two daughter cells.
There are two distinct types of cell division out of which the first one is vegetative division, wherein each daughter cell duplicates the parent cell called mitosis. The second one is meiosis, which divides into four haploid daughter cells.
Posted by Harika Gulibindala 5 years, 5 months ago
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Posted by Ayush Chaprana 5 years, 5 months ago
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Gaurav Seth 5 years, 5 months ago
Reproduction by Seeds
In the wild, Hibiscus species reproduce sexually when pollen from male flowers reaches female flowers for fertilization. Wind and wildlife transfer pollen, and large, colorful flowers are adapted to attract pollinators. Birds, butterflies and bees are common visitors to hibiscus plants, but they must visit quickly after blooms open since some species' flowers last for only a day. Successful pollination results in producing seeds, which are encased in pods. Seeds of many species, such as swamp hibiscus and rose mallow, resemble those of okra, a mallow family relative. When pods mature, they dry and crack open to release seeds, which fall to the ground and germinate to make more plants.
Stamen: is a male part of the flower it has a long filament with a elongated sac like structure its tip called the enter the enter hold the Pollen sacs inside which pollen grains are found
pistil: is the female part of the flower it has a tube like structure called the style. the style is oval-shaped at the base this is the ovary the tip of the style is sticky it is called the stigma it help to attach the pollen grains during pollination
Posted by Kalpana Swain 5 years, 5 months ago
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Ts Vlogs 5 years, 5 months ago
Yogita Ingle 5 years, 5 months ago
Respiration in Roots:
- Air occurs in soil interspaces. Root hairs of the roots are in direct contact with them.
- Oxygen of the soil air diffuses through root hair and reaches all internal cells of the root for respiration.
- Carbon dioxide produced by root cells diffuses in the opposite direction.
- In water-logged conditions, soil air becomes deficient. In the absence of oxygen, metabolic activity of the root declines and the plant may wither
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Lucifer?? Morningstar?? 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Artificial kidneys consists of a number of tubes with semi-permeable lining (selective permeable membrane). These tubes are suspended in a tank filled with dialysing fluid. The dialysing fluid has the same osmotic pressure as blood. This fluid does not contain nitrogenous wastes.
Working: The blood of the patient is passed through dialysing tubes. As blood passes through tubes, the waste products (e.g., urea) from the blood pass into dialysing fluid by diffusion. The purified blood is pumped back into the patient artificial kidney does filtration but no reabsorption, like kidney.
Posted by @S(Raj)Ali ?????? 5 years, 5 months ago
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Tvisha Sanghvi 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Taxonomy is a science that deals with naming, describing and classification of all living organisms including plants. Classification is based on behavioral, genetic and biochemical variations. Characterization, identification, and classification are the processes of taxonomy.Organisms are classified into similar categories namely kingdom, phylum, class, order, family, genus and species.
Posted by Mahi..... ♾ 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Digestive enzymes such as amylase, lipase, pepsin, trypsin, etc. helps to break the complex food particles into simple ones so that these simple particles can be easily absorbed by the blood and thus transported to all the cells of the body.
Gaurav Seth 5 years, 5 months ago
Digestive enzymes such as amylase, lipase, pepsin, trypsin, etc. helps to break the complex food particles into simple ones so that these simple particles can be easily absorbed by the blood and thus transported to all the cells of the body.
Posted by Mahi..... ♾ 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Ionic compounds have high melting points because there is a strong electrostatic force of attraction between the oppositely charged ions and hence a large amount of energy is required to break the strong bonding force between ions.
Gaurav Seth 5 years, 5 months ago
- Ionic compounds have an equal number of positive and negative ions arranged in the three-dimensional lattice due to which they have high melting points.
- The strong force of attraction between oppositely charged ions means that ionic compounds have high melting and boiling points.
- When dissolved in water ionic compounds form a solution in which ions can move. This means that these solutions can conduct electricity.
- Similarly, if ionic compounds are heated up so that they melt the ions can move and molten ionic compounds can also conduct electricity.
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Meghna Thapar 5 years, 5 months ago
A thermal decomposition reaction occurs when the heat is applied to a compound causing it to decompose (break down) into multiple different chemical substances. An example is when baking soda (sodium bicarbonate) is heated. 2NaHCO3(s)→CO2(g)+H2O(g)+Na2CO3(s)
Examples of thermal decomposition .
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