CBSE > Class 08 | CBSE Board | Homework Help

Ask questions which are clear, concise and easy to understand.

Ask Question

Write different uses of microbes. Explain them

Posted by Tanuja Choudhary 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 6 years, 5 months ago

Microorganisms are useful in the following ways:

In food and beverage industry
In making medicines and vaccines
In agriculture
In cleaning the environment

0Thank You

ANSWER

What is the SI unit for measuring pressure ?

Posted by Md Sultan 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 6 years, 5 months ago

The SI unit of pressure is Pascal (represented as Pa) which is equal to one newton per square metre (N/m^-2 or kg m^-1s^-2). Interestingly, this name was given in 1971. Before that pressure in SI was measured in newtons per square metre.

1Thank You

ANSWER

Who was akhbar

Posted by T S 6 years, 5 months ago

CBSE > Class 08 > हिंदी

3 answers

Shivam Bhadouria 6 years, 5 months ago

Akhbar was the power ruler of mughal

0Thank You

Voym Bera 6 years, 5 months ago

Akhbar is a very honest king

0Thank You

Mankirt Nie 6 years, 5 months ago

Akhbar has a king

2Thank You

ANSWER

what is a sprinkler system

Posted by Kailash Jangid 6 years, 5 months ago

CBSE > Class 08 > Science

3 answers

Lalit Lalit 6 years, 5 months ago

This system is more useful on the uneven land where sufficient water is not available. The perpendicular pipes, having rotating nozzles on top, are joined to the main pipeline at regular intervals. Sprinkler is very useful for lawns, coffee plantation and serve other crops.

1Thank You

Yogita Ingle 6 years, 5 months ago

Sprinkler system

In this system, there are perpendicular pipes with rotating nozzles on top. These pipes are joined to the main pipeline. Water flows through main pipeline under pressure by a pump. Water escapes from the nozzles & reaches the field.

0Thank You

Iftekhar Ahmad 6 years, 5 months ago

What is sprinkler system

0Thank You

ANSWER

What is the resultant force when two equal forces act on an object in the same direction?

Posted by Md Sultan 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 6 years, 5 months ago

Suppose two forces of same magnitude F are acting on an object in the same direction. In this case the forces adds up to give the net force. Thus, the net force on the object is given as:

F = F + F = 2 F.

1Thank You

ANSWER

What is ore?

Posted by Debasmita Deb 6 years, 5 months ago

CBSE > Class 08 > Social Science

2 answers

Swadesh Tayade 6 years, 5 months ago

An ore is a natural occurrence of rock or sediment that contains sufficient minerals with economically important elements, typically metals, that can be economically extracted from the deposit.[1] The ores are extracted at a profit from the earth through mining; they are then refined (often via smelting) to extract the valuable element, or elements. The ore grade, or concentration of an ore mineral or metal, as well as its form of occurrence, will directly affect the costs associated with mining the ore. The cost of extraction must thus be weighed against the metal value contained in the rock to determine what ore can be processed and what ore is of too low a grade to be worth mining. Metal ores are generally oxides, sulfides, silicates, or native metals (such as native copper) that are not commonly concentrated in the Earth's crust, or noble metals (not usually forming compounds) such as gold. The ores must be processed to extract the elements of interest from the waste rock and from the ore minerals. Ore bodies are formed by a variety of geological processes. The process of ore formation is called ore genesis.

2Thank You

Jasleena C 6 years, 5 months ago

0Thank You

ANSWER

What are the characteristics of minerals?

Posted by Debasmita Deb 6 years, 5 months ago

CBSE > Class 08 > Social Science

1 answers

Swadesh Tayade 6 years, 5 months ago

The physical characteristics of minerals include traits which are used to identify and describe mineral species. These traits include color, streak, luster, density, hardness, cleavage, fracture, tenacity, and crystal habit. Certain wavelengths of light are reflected by the atoms of a mineral's crystal lattice while others are absorbed. Those wavelengths of light which are reflected are perceived by the viewer to possess the property of color. Some minerals derive their color from the presence of a particular element within the crystal lattice. The presence of such an element can determine which wavelengths of light are reflected and which are absorbed. This type of coloration in minerals is termed idiochromatism; different samples of an idiochromatic mineral species will all display the same color. Other minerals are colored by the presence of certain elements in mixture. Different samples of such a species may exhibit a range of similar colors. Still other mineral species may usually be colorless, but may display several different and startling colors when trace amounts of impurities, or elements which are not an integral part of the crystalline lattice, are present. Coloration which is caused by the presence of an element foreign to the crystal lattice, whether in mixture or in trace amounts, is termed allochromatism. Certain elements are strong pigmenting agents and may lend vivid colors to specimens when they are present, whether as a part of the crystal lattice, in mixture, or as an impurity. These elements are termed the chromophores. Streak is the color which a mineral displays when it has been ground to a fine powder. Trace amounts of impurities do not tend to affect the streak of a mineral, so this characteristic is usually more predictable than color. Two different specimens of the same species may be expected to possess the same streak, whereas they may display different colors.

1Thank You

ANSWER

What is a mineral?

Posted by Debasmita Deb 6 years, 5 months ago

CBSE > Class 08 > Social Science

1 answers

Swadesh Tayade 6 years, 5 months ago

Minerals are defined as solid, inorganic, naturally occurring substances with a definite chemical formula and general structure. Almost all chemical elements in the Earth's crust are associated with at least one mineral. They vary in color, hardness, density, crystal form, crystal size, transparency, composition, location, and abundance. Some minerals are radioactive (uranophane), while others are magnetic (magnetite). Some are uncombined elements, such as gold, silver, sulfur, bismuth, copper and platinum. Certain minerals, such as fluorite (calcium fluoride), glow with a vibrant luminescence after exposure to ultraviolet light. Feldspar (a potassium aluminum silicate) and quartz (silicon dioxide) are the most abundant minerals found in the Earth's crust. Mankind has coveted many minerals and gemstones due to their striking, beautiful colors. Some specimens of opal exhibit iridescent, rainbow-like colors within their crystals, while some specimens of the gemstone tourmaline show progressions of watermelon-like green to pink color from one side of a crystal to another. Although interesting, a few minerals are deceiving; many amateur prospectors have been tricked into thinking they have found gold, but have instead found pyrite (iron disulfide), otherwise known as "Fool's Gold" due to its uncanny resemblance to the precious metal. Diamond, the hardest natural substance found on Earth, has long been prized as the most desirable of all minerals due to its stunning interaction with light. Most diamonds, though, are impure and not suitable as gemstones; instead, they find industrial use as cutting tools, and are even made synthetically to meet this demand.???

1Thank You

ANSWER

The indian state both keeps away from relegion as well intervenes in relegion . This idea can be quite confusing . Discuss it .

Posted by Gurveer Singh 6 years, 5 months ago

CBSE > Class 08 > Social Science

2 answers

Gurveer Singh 6 years, 5 months ago

*from

1Thank You

Gurveer Singh 6 years, 5 months ago

The indian state both keeps away fron religion as well as intervens in religion . This idea can be quite confusing because of the following reasons :- 1) it is against the human rights . 2) our constitution does not allow to practice these infantisides . 3) it is punishable by the law

1Thank You

ANSWER

Which inventions helped the voyages of discoveries in the 18 century

Posted by Sachin Maurya 6 years, 5 months ago

CBSE > Class 08 > Social Science

0 answers

ANSWER

What is the answer of x+7-8x (fraction) by 3=13 by 6-4x by3

Posted by Beegum Fathima 6 years, 5 months ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

Why are some fibbers called synthetic fibres ? Explain

Posted by Jadav Hardeep Jadav 6 years, 5 months ago

CBSE > Class 08 > Science

4 answers

Jadav Hardeep Jadav 6 years, 4 months ago

All wrong answers nice try

1Thank You

Lalit Lalit 6 years, 5 months ago

Some fibres are called synthetic fibre because they do not occur in the nature.

2Thank You

Sakshi Kushwah 6 years, 5 months ago

1Thank You

Yogita Ingle 6 years, 5 months ago

The reasons why some of the fibres are called synthetic is because man has prepared them by using chemicals. These are made of small units that join together to form long chains. Some of the examples of synthetic fibres are nylon, rayon, acrylic, polyester etc.

1Thank You

ANSWER

Why is paddy grown in rainy season?

Posted by Rita Singh 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Gurveer Singh 6 years, 5 months ago

Paddy is a kharif crop which is sown in rainy season . It acquires a lots of water for its growth . During winters large amount of water is not available . Hence , due to unavailability of sufficient water and unfavourable climatic conditions paddy shoild not be grown in the winter season .

2Thank You

ANSWER

Type of contact force and non contact force

Posted by Lipi Banerjee 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 6 years, 5 months ago

Contact forces : Force that arises with the contact of 2 or more objects involved. Examples : Muscular force and Frictional Force

Non-contact forces: Forces that arise without the contact of 2 or more objects involved. Examples: Magnetic Force, Electrostatic Force, Gravitational force.

2Thank You

ANSWER

What is the meaning of thrust

Posted by Parth Arora 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 6 years, 5 months ago

Thrust : Force acting on an object perpendicular to the surface is called thrust.

SI unit is ‘N’.

1Thank You

ANSWER

Give a brief description of ryat wari system

Posted by Swaraj Kothari 6 years, 5 months ago

CBSE > Class 08 > Social Science

1 answers

Yogita Ingle 6 years, 5 months ago

The ryotwari system was introduced by Captain Alexander Read. This system was further developed by Thomas Munroe. According to the new system the revenue was to be collected directly from the farmers or ryots. This was necessary as the zamindari system was not prevalent in the southern regions. The lands of each farmer were separately assessed and the revenue was fixed accordingly. This system was also known as the Munro System.

1Thank You

ANSWER

What do you mean by livestock

Posted by Pratheek Halvi 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Sia ? 6 years, 5 months ago

Livestock is farm animals regarded as an asset.

0Thank You

ANSWER

What is dry storage?

Posted by Pratheek Halvi 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Sia ? 6 years, 5 months ago

Dry storage is the cold storage (as for milk and cream) in which refrigeration is by a current of cooled air.

1Thank You

ANSWER

Nehru ji ke Drishti Mein Virasat ke Mayne kya tha

Posted by Music Adda Akv 6 years, 5 months ago

CBSE > Class 08 > हिंदी

0 answers

ANSWER

We should not wear synthetic clothes while working in kitchen laboratory?

Posted by Jadav Hardeep Jadav 6 years, 5 months ago

CBSE > Class 08 > Science

3 answers

Sia ? 6 years, 5 months ago

Synthetic fibres melt very soon on heating. If the clothes catch fire, it can be disastrous. The fabrics melt and stick to the body of a person wearing it. We should therefore not wear synthetic clothes while working in the kitchen.

3Thank You

Manoj Chauhan 6 years, 5 months ago

They catch fire easily

1Thank You

Debasmita Deb 6 years, 5 months ago

Because they catch fire easily

1Thank You

ANSWER

What is the meaning of the mathematics

Posted by Manjunatha C 6 years, 5 months ago

CBSE > Class 08 > Mathematics

1 answers

Sia ? 6 years, 5 months ago

Mathematics includes the study of such topics as quantity, structure (algebra), space (geometry), and change (mathematical analysis).It has no generally accepted definition.

0Thank You

ANSWER

Waht is horticulture

Posted by Daksh Shrivastav 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Sia ? 6 years, 5 months ago

Horticulture has been defined as the culture of plants, mainly for food, materials, comfort and beauty.

1Thank You

ANSWER

Discribe any three features of Permanent settlement

Posted by Pushpa Harini 6 years, 5 months ago

CBSE > Class 08 > Social Science

2 answers

Sia ? 6 years, 5 months ago

The main features of Permanent Settlement are as follows:

Rajas and taluqdars were recognised as zamindars, who were asked to collect rent from the peasants and pay revenue to the company.
The amount to be paid was fixed.
The revenue that had been fixed was so high that the zamindars found it difficult to pay.
This would ensure a regular flow of revenue into the company’s coffers and at the same time encourage the zamindars to invest in improving the land.

2Thank You

Yogita Ingle 6 years, 5 months ago

Following were the main features of the Permanent Settlement:
(a)The rajas and taluqdars were recognised as zamindars.
(b)They were responsible for collecting revenue from peasants and paying to the Company.
(c)Revenue demand was permanently fixed.

1Thank You

ANSWER

सिंधु घाटी की सभ्यता का अंत कैसे हुआ होगा ?

Posted by Suresh Kumar 6 years, 5 months ago

CBSE > Class 08 > हिंदी

0 answers

ANSWER

How the camel got his hump (please write the summary)

Posted by Vengappan Pachiyappan 6 years, 5 months ago

CBSE > Class 08 > English

0 answers

ANSWER

Summary on how the camel got his hump.

Posted by Vengappan Pachiyappan 6 years, 5 months ago

CBSE > Class 08 > English

0 answers

ANSWER

The role of women in nationalist struggle

Posted by Digvijay Tiwari 6 years, 5 months ago

CBSE > Class 08 > Social Science

0 answers

ANSWER

Write about human resource

Posted by Rajan Ranjan 6 years, 5 months ago

CBSE > Class 08 > Social Science

2 answers

Sia ? 6 years, 5 months ago

Human resource is the ultimate resource. Healthy, educated and motivated people develop resources as per their requirements.

0Thank You

Swadesh Tayade 6 years, 5 months ago

Human resources are the people who make up the workforce of an organization, business sector, or economy. "Human capital" is sometimes used synonymously with "human resources", although human capital typically refers to a narrower effect (i.e., the knowledge the individuals embody and economic growth). Likewise, other terms sometimes used include manpower, talent, labor, personnel, or simply people. A human-resources department (HR department) of an organization performs human resource management, overseeing various aspects of employment, such as compliance with labor law and employment standards, administration of employee benefits, and some aspects of recruitment.

0Thank You

ANSWER

Write greatest four digit no. Which is a perfect sq.

Posted by Ajay Tiwari 6 years, 5 months ago

CBSE > Class 08 > Mathematics