Ask questions which are clear, concise and easy to understand.
Ask QuestionPosted by Monish Makhija 6 years, 4 months ago
- 2 answers
Posted by Suhail Hayat 6 years, 4 months ago
- 1 answers
Diya Sarma 6 years, 4 months ago
Posted by Hema Manoj 6 years, 4 months ago
- 1 answers
Sia ? 6 years, 4 months ago
Do not use ice or iced water on burns. The extreme cold causes constriction of the blood vessels and can worsen injury by reducing blood supply
Posted by Shiwansu Dwivedi 6 years, 4 months ago
- 1 answers
Posted by Lucky Sharma 6 years, 4 months ago
- 0 answers
Posted by Aalok Agrawal 6 years, 4 months ago
- 2 answers
Yogita Ingle 6 years, 4 months ago
Combustion is a chemical process in which a substance reacts with oxygen and gives out energy during the process in the form of either heat or light or both. Rusting of an iron is an exothermic process as heat is released in rusting. Hence it is a kind of slow combustion.
Posted by Tanya Sharma 6 years, 4 months ago
- 1 answers
Posted by P.Ramesh Babu 6 years, 4 months ago
- 1 answers
Yogita Ingle 6 years, 3 months ago
The Resultant force is defined as the total force acting on a body along with their directions. When the object is at rest or travelling with the same velocity, the resultant force has to be zero. Since all the forces are acting towards the same direction, the resultant force should be same for all the forces.
If one force is acting perpendicular to another, the resultant force is determined by using Pythagorean theorem.The Resultant force formula is given by,
FR = F1 + F2 + F3
Where,
F1, F2, F3 are the forces acting in the same direction on a body.
Posted by Aditya Kshirsagar 6 years, 4 months ago
- 1 answers
Posted by Naman Bansal 6 years, 4 months ago
- 1 answers
Posted by Anu Nagar 6 years, 4 months ago
- 3 answers
Posted by Anu Nagar 6 years, 4 months ago
- 1 answers
Meghna Thapar 5 years, 10 months ago
Guard cells are kidney shaped structures or bean shaped structures that surround a stoma and play an important role in gaseous exchange.
Posted by Anu Nagar 6 years, 4 months ago
- 1 answers
Meghna Thapar 5 years, 10 months ago
Cell wall is mainly composed of cellulose. Cellulose is a complex substance and provides structural strength to plants.
Posted by Anu Nagar 6 years, 4 months ago
- 2 answers
Posted by Ram Chandak 6 years, 4 months ago
- 0 answers
Posted by Ramandeep Kaur 5 years, 8 months ago
- 3 answers
Posted by Radha Moni 6 years, 4 months ago
- 3 answers
Posted by Gauri Lohani 6 years, 4 months ago
- 0 answers
Posted by Hanu Sahu 6 years, 4 months ago
- 1 answers
Divyansh Singh 6 years, 4 months ago
Posted by Mahima Choudhary 6 years, 4 months ago
- 2 answers
Jasleen Kaur 6 years, 3 months ago
Rekhram Deshmukh 6 years, 4 months ago
Posted by Talha Gazali 6 years, 4 months ago
- 2 answers
Gurleen Kaur 6 years, 4 months ago
Yogita Ingle 6 years, 4 months ago
Formation of Coal:
- Coal was formed by the decomposition of large land plants and trees buried under the Earth about 300 million years ago.
- About 300 million years ago, the Earth had dense forests in the low lying wet areas.
- Due to natural calamities like earthquakes, volcanoes, floods, etc. these forests got buried under the surface of the Earth.
- As more soil got deposited on them, they were compressed.
- As a result, the temperature also rose as they sank deeper and deeper.
- Due to high pressure and temperature and the absence of air, the wood of the buried forest plants and trees slowly got converted into coal.
- The slow process by which the dead plants buried under the Earth have become coal is called as carbonisation.
- Since coal was formed from the remains of the plants, it is called a fossil fuel.
- Coal, which is mainly carbon, on heating produces mainly carbon dioxide gas and a lot of heat energy.
Posted by Nikhil Khode 6 years, 4 months ago
- 1 answers
Posted by Riya Kumar 6 years, 4 months ago
- 0 answers
Posted by Laxman Sahu 6 years, 4 months ago
- 1 answers
Yogita Ingle 6 years, 4 months ago
Coal: Coal is a fossil fuel. It is hard as stone, black in colour and is mainly composed of carbon.
Carbonisation: The process of conversion of vegetation into coal is called carbonization. The buried plants underwent carbonization and changed into coal.
Posted by Shiksha Chahar 6 years, 4 months ago
- 2 answers
Ravi Kumar 6 years, 3 months ago
Posted by Badal Naik 6 years, 4 months ago
- 1 answers
Yogita Ingle 6 years, 4 months ago
The advantages of using compressed natural gas (CNG) :
- They can be burnt directly.
- They can be transported easily through pipelines.
- They are clean fuels and do not give smoke when burnt.
- They give a lot of heat energy when burnt.
Posted by Pavada Deepu 6 years, 4 months ago
- 5 answers
Posted by Rytham Kapoor 6 years, 4 months ago
- 1 answers
Yogita Ingle 6 years, 4 months ago
Pregnancy occurs when the sperm fertilizes the egg, and the zygote is formed. The zygote gets implanted in the wall of the uterus. As soon as the implantation takes place, the need for nourishment and care arises as the growth of the zygote develops into an embryo which further grows into a baby. This responsibility is taken up by a layer formed between the baby and the mother, called the placenta. The placenta is formed by finger-like projections called chorionic villi and the uterine tissue.
Posted by Haojam Rodi Miranda 6 years, 4 months ago
- 1 answers
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
Ashu Gond 6 years, 4 months ago
1Thank You