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Ask QuestionPosted by Padmaveer Bedkihale 4 years, 11 months ago
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Gaurav Seth 4 years, 11 months ago
A n s w e r
dispersion of light.
The phenomenon of splitting of white light into its constituent seven colours on passing through a glass prism is called dispersion of light.
Posted by Soundarya More 4 years, 11 months ago
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Khushi Jaiswal 4 years, 11 months ago
Posted by Omm Prakash 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
Image formed by a plane mirror has the following characteristics:
- Virtual and erect.
- Behind the mirror.
- Size of image is equal to size of object.
- Laterally inverted image (image of left side visible on right side).
- Distance of image behind the mirror is same as distance of object from mirror.
Khushi Jaiswal 4 years, 11 months ago
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Posted by Soundarya More 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
A rough surface will cause more friction than a smooth surface. Because, rough offers more resistance to the other surface in contact as compared to the smooth surface
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In chemistry, a nonmetal is a chemical element that mostly lacks the characteristics of a metal. Physically, a nonmetal tends to have a relatively low melting point, boiling point, and density. A nonmetal is typically brittle when solid and usually has poor thermal conductivity and electrical conductivity. Non-metals are not able to conduct electricity or heat very well. As opposed to metals, non-metallic elements are very brittle, and cannot be rolled into wires or pounded into sheets. The non-metals exist in two of the three states of matter at room temperature: gases (such as oxygen) and solids (such as carbon).
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Posted by Shah Munazil 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
Applications of Electroplating
- Artificial jewelry, usually made of less expensive metals is often plated with a thin layer of a precious metal like gold and silver to make it more lustrous, appealing but cheaper.
- Many industrial applications use electroplating to create a protective barrier on a metal substrate. The protective barrier in this case prevents tarnishing and gives a glossy appearance. Eg: Chromium plating is done on car spare parts, taps, wheel rims etc. Chromium is very expensive and the whole part cannot be made of chromium. So, it is coated with chromium to give it a shiny appearance.
- Tinning (electroplating of tin) is a very cost-effective electroplating solution. Tin is relatively cheaper and is used for electroplating electronic components, hardware products, fasteners, screws, nuts, bolts and food cans. If food is stored in iron cans, it would tend to get spoilt over a period of time. But, when iron is electroplated with tin, it prevents the food from getting spoilt. Tinning offers resistance against corrosion
- Zinc electroplating offers excellent adhesion and resistance to corrosion. So, it is used to electroplate automobile parts and body, transmission components, defense carriers and tanks.
Aryan Singh 4 years, 11 months ago
Posted by Abhinav Khandelwal 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
True, The sprinkler system is more useful on uneven lands where sufficient water is not available. In this method, water is supplied using pipes to one or more central locations within the field. When water is allowed to flow under high pressure with the help of a pump, it gets sprinkled on the crops.
Posted by Atharva Bhosale 4 years, 11 months ago
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Meghna Thapar 4 years, 10 months ago
Pure sulfur is a tasteless, odourless, brittle solid that is pale yellow in colour, a poor conductor of electricity, and insoluble in water. It reacts with all metals except gold and platinum, forming sulfides; it also forms compounds with several nonmetallic elements. In normal conditions oxygen is a colourless, odourless and insipid gas; it condensates in a light blue liquid. Oxygen is part of a small group of gasses literally paramagnetic, and it's the most paramagnetic of all. Liquid oxygen is also slightly paramagnetic. A yellowy-green dense gas with a choking smell. Chlorine kills bacteria – it is a disinfectant. It is used to treat drinking water and swimming pool water. It is also used to make hundreds of consumer products from paper to paints, and from textiles to insecticides.
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The species which are facing the risk of extinction are called endangered species.
They are the animals and plants that exist in small number on the earth, and if we do not take quick action to save them, they may be lost for ever.
An animal species become endangered either because it is few in number or it is being killed by predators or it is being hunted by human beings or its natural habitat is destroyed by deforestation.
For Example: Tiger, snow leopard, Great Indian rhinoceros, Asiatic lion, desert cat etc.
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The period of life, when the body undergoes changes, leading to reproductive maturity, is called adolescence. The period of adolescence is normally 11 years to 19 years.
Posted by Sandesh Anil 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
Alloys are metal mixtures with other elements, the precise combination of which is governed by the properties required. In general, alloys are considered metallic in nature, i.e. they have good thermal and electrical conductivity.
Examples of alloys are listed below
- Steel
- Nichrome
- Bronze
- Brass
- Duralumin
- Solder
Soundarya More 4 years, 11 months ago
Posted by Noman Shaikh 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
Uses of Silicon
- The element is a major constituent in ceramics and bricks.
- Being a semiconductor, the element is put into use for making transistors.
- Silicon is widely used in computer chips and solar cells.
- It is a vital component of Portland cement.
- Silicon is used in the production of fire bricks.
- Several waterproofing systems employ silicones as a component.
- Silicon is used in much mould release agents and moulding compounds.
- It is also a component of ferrosilicon – an alloy widely used in the steel industry.
Uses Of Phosphorus
- There are four forms of phosphorous usually used these days: white, black, red, and violet.
- It’s simple to spot phosphorus at position number fifteen on the periodic table just under nitrogen (N).
- One can also find phosphorus in fireworks, fertilizers, and baking powder.
- Phosphorus also plays a role in the making of steel.
- Phosphates are also used in the production of fine chinaware and special glasses.
Soundarya More 4 years, 11 months ago
Posted by Noman Shaikh 4 years, 11 months ago
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Poornima B 4 years, 11 months ago
Yogita Ingle 4 years, 11 months ago
| These are solids at room temperature except mercury | These exist in all three states |
| These are very hard except sodium | These are soft except diamond |
| These are malleable and ductile | These are brittle and can breakdown into pieces |
| These are shiny | These are non-lustrous except iodine |
| Electropositive in nature | Electronegative in nature |
| Have high densities | Have low densities |
Posted by Noman Shaikh 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
Our body is composed of almost every natural element found in nature. This is as true for metals as it is for water or carbon.
Metals are elements that are required for several purposes, such as the formation of blood, bones, teeth and other tissues; osmoregulation of body fluids, and the control of physicochemical processes. Some of these metals are only needed in trace amounts.
These metals are generally found in a typical, diverse diet. If a person is low in specific metals, this deficiency can create different types of problems and diseases. Excess metals, caused by supplementation, can also cause health problems.
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Shashank Priyadarshi 4 years, 11 months ago
2Thank You