Ask questions which are clear, concise and easy to understand.
Ask QuestionPosted by Adarsh Mishra 5 years, 5 months ago
- 0 answers
Posted by Mansi Mishra 5 years, 5 months ago
- 3 answers
Krishna Ballav Kumar 5 years, 5 months ago
Yogita Ingle 5 years, 5 months ago
There are three layers of earth
The Inner Core
It is the centre and the hottest layer of the Earth. The inner core is solid and made up of iron and nickel with temperature up to 5,500oC. Due to its immense heat energy, the inner core is more like the engine room of the Earth.
The Outer Core
The outer core of the Earth is similar to a very hot ball of metals, whose temperature is around 4000 oF to 90000F. It is so hot that the metals inside are all in the liquid state. The outer core is located around 1800 miles under the crust and approximately 1400 miles thick. It is composed of metals such as iron and nickel. The outer core surrounds the inner core.
The inner core has pressures and temperatures so high that the metals are squeezed together and not able to move like a liquid, but are forced to vibrate instead of solid.
Mantle
Mantle is the widest section of the Earth. Its thickness is approximately 2,900 km. The mantle is mainly made up of semi-molten rock known as magma. The rock is hard in the upper part of the mantle, but lower down the rock is softer and begins to melt.
Posted by Mansi Mishra 5 years, 5 months ago
- 2 answers
Posted by . . 5 years, 5 months ago
- 3 answers
Manjesh Yadav 5 years, 5 months ago
Posted by Sunil Kalyani Pattnayak 5 years, 5 months ago
- 2 answers
Pranjal Singh 5 years, 5 months ago
. . 5 years, 5 months ago
Posted by . . 5 years, 5 months ago
- 2 answers
Posted by As Patil 5 years, 5 months ago
- 2 answers
Posted by Divya Patkar 5 years, 5 months ago
- 2 answers
Posted by Prem Dalvi 5 years, 5 months ago
- 1 answers
Meghna Thapar 5 years, 5 months ago
The period of fourth generation was from 1971-1980. Computers of fourth generation used Very Large Scale Integrated (VLSI) circuits. Fourth generation computers became more powerful, compact, reliable, and affordable. As a result, it gave rise to Personal Computer (PC) revolution.
Features of first generation computers:
- Technology used: vacuum tube.
- Machines languages were used to instruct the computer.
- Magnetic core memory was used as primary memory.
- Electrostatic tubes, Parer tape, punch card, magnetic tape.
Posted by Harshita Pal 5 years, 5 months ago
- 3 answers
Aditya Pawar 5 years, 5 months ago
Posted by Sehrish Naaz 5 years, 5 months ago
- 1 answers
Posted by Jenil Ode 5 years, 5 months ago
- 1 answers
Posted by Jenil Ode 5 years, 5 months ago
- 2 answers
Posted by Sanjana Manish Pardeshi 5 years, 5 months ago
- 1 answers
Meghna Thapar 5 years, 5 months ago
A physical change is a change to a sample of matter in which some properties of the material change, but the identity of the matter does not. In a reversible physical change, the original form of the matter can be restored. In an irreversible physical change, the original form cannot be restored. A reversible change is the one in which a substance that is undergoing the change can be recovered in its original form while physical changes usually involve changes in these properties of a substance.
Posted by Abhiyansh Yaduvanshi 5 years, 5 months ago
- 0 answers
Posted by Rishit Chandra 5 years, 5 months ago
- 1 answers
Posted by . . 5 years, 5 months ago
- 3 answers
Posted by Vankadari Sakshith Hanan 5 years, 5 months ago
- 4 answers
Posted by Nisha Kumari 5 years, 5 months ago
- 3 answers
Ishan Kuduchkar 5 years, 5 months ago
Gaurav Seth 5 years, 5 months ago
Acids
The term acid is derived from a Latin word ‘acidus’ or ‘acere’, which means sour. The most common characteristic is their sour taste. An acid is a substance that renders ionizable hydronium ion (H3O+) in its aqueous solution. It turns blue litmus paper red.
Bases
The most common characteristic of bases is their bitter taste and soapy feel. A base is a substance that renders hydroxyl ion(OH–) in their aqueous solution. Bases turn the colour of red litmus paper to blue.
Salts
Salt is an ionic compound that results from the neutralization reaction of acids and bases. Salts are constituted of positively charged ions, known as cations and negatively charged ions, known as anions, which can either be organic or inorganic in nature. These ions are present in a relative amount, thus rendering the nature of the salt neutral.
Yogita Ingle 5 years, 5 months ago
Acids
-
-
An acid is a chemical substance that has a sour taste.
-
Many food items such as lemons, curd, vinegar and orange taste sour because of the presence of acid in them.
-
Acidic Substances are the substances that contain acid in them.
-
Natural Acids are the acids that occur in nature, for example, acids found in fruits are natural acids.
Bases-
A base is a chemical substance that has a bitter taste and a soapy texture.
-
Bases are found in different substances such as bleach, ammonia, washing powder and soap.
-
Posted by Muskan Muskan 5 years, 5 months ago
- 5 answers
Posted by Sagar Naik 5 years, 5 months ago
- 1 answers
Posted by Sanjana Dangari 5 years, 5 months ago
- 1 answers
Yogita Ingle 5 years, 5 months ago
It means that every person, from the President of the country to a normal person has to obey the same laws. No person can be discriminated against on the basis of their religion, race, caste, etc. Every person has access to all public places including playgrounds, hotels, shops, and markets. All persons can use publicly available wells, roads and bathing ghats.
Equality is the soul of democracy. We know that democracy is a form of government which gives equal importance and recognition to all. If inequalities on the basis of race, religion, caste, etc. continue to exist, democracy would never flourish. Instead, it would perish very soon.
Posted by Aastha Jat 5 years, 5 months ago
- 2 answers
Ishan Kuduchkar 5 years, 5 months ago
Yogita Ingle 5 years, 5 months ago
Bone marrow, also called myeloid tissue, soft, gelatinous tissue that fills the cavities of the bones. Bone marrow is either red or yellow, depending upon the preponderance of hematopoietic (red) or fatty (yellow) tissue.
Posted by Sanjana Dangari 5 years, 5 months ago
- 1 answers
Yogita Ingle 5 years, 5 months ago
A minor chiefly family known as the Muttaraiyar held power in the Kaveri delta. They were subordinate to the Pallava kings of Kanchipuram. Vijayalaya, who belonged to the ancient chiefly family of the Cholas from Uraiyur, captured the delta from the Muttaraiyar in the middle of the ninth century. The successors of Vijayalaya conquered neighbouring regions and the kingdom grew in size and power. Rajaraja I and Rajendra I were the most powerful Chola leaders.
Posted by Riya Verma Verma 5 years, 5 months ago
- 3 answers
Yogita Ingle 5 years, 5 months ago
The route spanning the Grand Trunk (GT) road existed during the Maurya Empire, extending from the mouth of the Ganges to the north-western frontier of the Empire. The predecessor of the modern road was rebuilt by Sher Shah Suri, who renovated and extended the ancient Mauryan route in the 16th century. The road was considerably upgraded in the British period between 1833 and 1860.
Posted by Riya Verma Verma 5 years, 5 months ago
- 3 answers
Saurav Bisht 5 years, 5 months ago
Sanjana Manish Pardeshi 5 years, 5 months ago
Gaurav Seth 5 years, 5 months ago
मिठाईवाला अलग-अलग चीज़ें क्यों बेचता था और वह महीनों बाद क्यों आता था?
Answer:
बच्चे एक चीज़ से ऊब न जाएँ इसलिए मिठाईवाला अलग – अलग चीज़ें बेचता था। बच्चों में उत्सुकता बनाए रखने के लिए वह महीनों, बाद आता था। साथ ही चीज़ें न मिलने से बच्चे रोएँ, ऐसा मिठाई वाला नहीं चाहता था।
Posted by 𝑺𝒖𝒓𝒂𝒃𝒉𝒊 𝑺𝒂𝒖𝒎𝒚𝒂 5 years, 5 months ago
- 2 answers
Ishan Kuduchkar 5 years, 5 months ago
Gaurav Seth 5 years, 5 months ago
When iron is mixed (or alloyed) with carbon chromium and nickel, then stainless steel is obtained. Stainless steel is an alloy of iron.
Cooking utensils, knives, scissors and surgical instruments are made of stainless steel and do not rust at all.
Posted by Sejal Singh 5 years, 5 months ago
- 3 answers
Kalpana Rajesh 5 years, 5 months ago
myCBSEguide
Trusted by 1 Crore+ Students
Test Generator
Create papers online. It's FREE.
CUET Mock Tests
75,000+ questions to practice only on myCBSEguide app
