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Ask QuestionPosted by ☆ Taniskasree ☆ 3 years, 11 months ago
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Posted by Munna Gupta 3 years, 11 months ago
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Kanishka Vats 3 years, 11 months ago
Kanishka Vats 3 years, 11 months ago
Gaurav Seth 3 years, 11 months ago
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Artificial Magnets |
Natural Magnets |
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Artificial magnets are made by man by using different techniques. |
Natural magnets are found in nature. |
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They are stronger as compared to natural magnets. |
They are weaker as compared to artificial magnets. |
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They can be temporary or permanent magnets |
Natural magnets are always permanent magnets |
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They are available in different shapes and sizes. |
They are available in the shapes and sizes as they occur in nature. |
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Example - Horse shoe magnet, bar magnet. |
Example - Magnetite (Lodestone) |
Yogita Ingle 3 years, 11 months ago
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Nature Magnets |
Artificial Magnet |
|
Natural magnets are found in nature |
Artificial magnets are made by using different techniques |
|
They are weaker in magnetic strength as compared to natural magnets |
They are stronger in magnetic strength as compared to natural magnets |
|
These are always permanent magnets whose magnetic strength never fades |
These can be permanent or temporary magnets |
|
These are available in different shapes and sizes as they occur in nature |
These are available in different shapes and sizes |
|
Example: Lodestone (Magnetite) |
Example:Bar magnet, Horse shoe magnet |
Posted by Prince Raj Kumar 3 years, 11 months ago
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Gaurav Seth 3 years, 11 months ago
An electric cell is used to operate things such as the clocks, calculators, phones, etc. It is a small source of energy. It is also known as a pencil cell or dry cell. It converts chemical energy into electrical energy. A dry cell is a primary cell that is non-rechargeable and thus cannot be reused. These cells are used in a number of household gadgets like a radio, a transistor, a tape-recorder, a calculator, etc.
Construction
- It consists of a zinc container with a small brass cap on one side of the cell which is labelled as positive (+) and a metal base at the other side of the cell which is labeled as negative (-).
- The positive and negative sides of the cells are called as positive terminal and negative terminal of the cell respectively.
- A carbon rod is placed at the centre of the cell surrounded by a mixture of manganese dioxide (MnO2) and charcoal (C) in a muslin bag.
- The electrolyte is a moist paste of ammonium chloride (NH4CI), plaster of paris, flour, etc. and the outer body (except for the base) of a zinc container is insulated with a thick cardboard or plastic material.
Working
- When the cell is connected to a bulb, the chemical reaction inside the cell becomes fast and the current starts flowing through the bulb. Hence, the bulb glows.
- These dry cells are a small source of electricity.
Note:The dry cells actually are not dry. In fact, it works as long as the paste inside it remains moist. The presence of water (or moisture) helps in the movement of the ions within the cell from one electrode to the other.
Posted by Dikhita Kalita 3 years, 11 months ago
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Meghna Roy 3 years, 10 months ago
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Yogita Ingle 3 years, 11 months ago
All the bones in our body form a framework to give a shape to our body. This framework is called the skeleton. Thus a skeleton is made up of many bones.
Posted by B.S Shabdha 3 years, 11 months ago
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Yogita Ingle 3 years, 11 months ago
The hip bone is also known as pelvic bone. It is made up of number of bones fused together by fixed joints. The hip bone encloses the portion of our body below the stomach. The hip bones has two sockets on the two sides of its lower part.
Arya Ranjan 3 years, 11 months ago
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Posted by Sandeep Verma 3 years, 11 months ago
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Arya Ranjan 3 years, 11 months ago
Gaurav Seth 3 years, 11 months ago
The full form of FBI is the Federal Bureau of Investigation. It was established on July 26, 1908, as a government department belonging to the Department of Justice of the United States. It was first founded in 1908 as a name of Bureau of Investigation, and it was eventually changed to the Federal Bureau of Investigation in 1935.
- The FBI director is appointed by the United States The Senate approves the selection of the President.
- The FBI is headquartered located in Washington, D.C. In the J. Edgar Hoover Building.
- The FBI’s main agenda is to look after and maintain law and order in the United States by protecting the country from terrorist violence, cybercrime and high-tech crime, and protecting civil rights.
- It also provides investigative skills, information, & training to foreign and national agencies and collaborators.
Posted by Sandeep Verma 3 years, 11 months ago
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Posted by Poulami Dhar 3 years, 11 months ago
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Gaurav Seth 3 years, 11 months ago
Cactus lose very little water through transpiration. The leaves in cactus plants are present in the shape of spines. This helps in reducing loss of water from the leaves through transpiration. Its stem is converted into a leaf-like structure. Photosynthesis in these plants is usually carried out by the stems. The stem is also covered with a thick waxy layer, which helps to retain water. Cactus plants have roots that go very deep into the soil for absorbing water.
Posted by Rutvi Jadhav 3 years, 11 months ago
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Gaurav Seth 3 years, 11 months ago
A n s w e r
Water is colorless and transparent because ALL except a tiny bit of blue (for pure water) are reflected back. Since water reflects all colors together it looks colorless.
Posted by Mahabhi Vyshnavi 3 years, 11 months ago
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Gaurav Seth 3 years, 11 months ago
Food is important for us because:
- Food gives us energy.
- Food is necessary for growth and development of body.
- It protects us from diseases.
- Nutritious food provides mental growth in addition to health.
- Helps in formation of body.
Posted by ☆ Taniskasree ☆ 3 years, 11 months ago
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Gaurav Seth 3 years, 11 months ago
When white light is passed through a glass prism it splits into its spectrum of colours (in order violet, indigo, blue, green, yellow, orange and red) and this process of white light splitting into its constituent colours is termed as dispersion.
Posted by Kumkum Semekar 3 years, 11 months ago
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Posted by Chanukya Ram 3 years, 11 months ago
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Posted by Manan Jain 📚📚📚✔✔ 3 years, 11 months ago
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Gargi Sarkar 3 years, 11 months ago
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Yogita Ingle 3 years, 11 months ago
Formation of shadows
When an opaque object is placed in path of light, a dark portion is formed on the opposite side of object on the screen. This dark portion is shadow.
(1) The size of shadow depends on the distance of source of light and on the angle at which the light rays fall on the object.
(2) If the source of light is closer to the object, a larger shadow is formed than when the source of light is far from the object.
(3) The shadow can be seen only on a screen. The ground, walls of the rooms, a building, or other such surfaces act as a screen for the shadows you observe in everyday life
(4) Shadows sometimes gives lot of information about the object.
(5) Shadows are in black in colour and this is not changed by the colour of the opaque objects. So a red and yellow rose will have same black shadows.
Posted by Tripti Trisha 3 years, 11 months ago
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Yogita Ingle 3 years, 11 months ago
Autotrophs are organisms that undergo autotrophic mode of nutrition. These are the organisms that can prepare their own food from simple substances like carbon dioxide and water. All green plants are examples of autotrophs. These green plants contain chlorophyll pigment in the plant cell that helps in the synthesis of their own food by absorbing energy from the sunlight. All autotrophs are producers and are placed at the primary level in the food web.
Posted by Auromita Barada 3 years, 11 months ago
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Divyanshi Kasaudhan 3 years, 11 months ago
Yogita Ingle 3 years, 11 months ago
The shadow can be seen only on a screen. The ground, walls of the rooms, a building, or other such surfaces act as a screen for the shadows you observe in everyday life
Posted by Pintu Gami 3 years, 11 months ago
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Gaurav Seth 3 years, 11 months ago
A n s w e r
Sirius is the brightest star in the sky after the sun , lying in the constellation Canis
Its name is derived from the Greek word Seirios which means "glowing" or "scorching
Yogita Ingle 3 years, 11 months ago
A closed path through which the electric current flows is called an electric circuit. The direction of electric current in an electric circuit is from the positive terminal to the negative terminal. This is opposite to the direction of flow of electrons; which is from the negative terminal to the positive terminal.
Posted by Gaurav Chander 3 years, 11 months ago
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Yogita Ingle 3 years, 11 months ago
The place where an organism lives is known as habitat. The term habitat is more specific environment. Habitat constitutes a part of the total environment of that region. It must offer to an organism shelter, food and congenial climatic conditions which will be well-suited for the organism to survive, reproduce and flourish. In other words, a place where suitable conditions for the existence of an organism prevail is the habitat of that organism. For example, the habitat of a fish may be a lake, pond, river, sea or other aquatic systems. The habitats of cacti and camel are sandy, dry, hot deserts. Snowbound, extremely cold Polar Regions are the natural habitats of polar bears. The habitat of Indian rhinoceros is grassland and forest area of the foothills of the Himalayas in Central Nepal and some pockets of plains of west Bengal and Assam. Red blood corpuscle of human blood is the habitat of the malarial parasite (plasmodium).
If we say that fishes live in water and monkeys live in forests, it would not be adequate. Freshwater fishes cannot live in sea water and vice versa. Bonnet monkeys and langurs are found only in the tropical forests of South India, Sri Lanka, Burma, Thailand, Malay, and Singapore. These forests offer to these monkeys a habitat with specific climate, woods, plants and other animals to interact with. The habitat of a tiger must have small animals for the tiger to hunt and feed upon. It should also include thick vegetation in the form of shady trees and shrubs where the tiger can hide and wait for its prey. These conditions form the biotic components of a habitat of tiger. Thus the Himalayan tiger can only live in the Himalayan forests and the Bengal tigers in the Sunderbans. These tigers cannot live in the rocky mountains of North-West America.
Posted by Ayaan Simon Abraham 3 years, 11 months ago
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Yogita Ingle 3 years, 11 months ago
The role of the reflector is to gather the light emitted by the source and focus it out thus creating a strong beam of light.
Posted by Kanav Grover Vi C Grover 3 years, 11 months ago
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Posted by Pankajini Hans 3 years, 11 months ago
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Disha Dadhich 3 years, 11 months ago
New Things By Chirag And Heetu 3 years, 11 months ago
Gaurav Seth 3 years, 11 months ago
Nutrients are substances that are needed by our body for proper growth and healthy body function. There are six main components present in food: carbohydrates, fats, proteins, vitamins, minerals, and roughage or dietary fibres
Posted by Abhishek Kumar 3 years, 11 months ago
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Gaurav Seth 3 years, 11 months ago
blowhole : a hole that is on the top of a whale or related animal's head and is used by the animal for breathing.
A hole that is on the top of a whale or dolphin's head and is used by them for breathing is called a blowhole or nostril
Posted by Lanki Ghyanavi 3 years, 11 months ago
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Gaurav Seth 3 years, 11 months ago
Water is an inorganic, transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth's hydrosphere and the fluids of all known living organisms. It is vital for all known forms of life, even though it provides no calories or organic nutrients
Posted by Raja Yadav 3 years, 11 months ago
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Yogita Ingle 3 years, 11 months ago
- The one-cell thickness of the walls of the capillaries makes them very thin and hence permeable.
- The cells take up useful substances from the tissue fluid and give out the waste substance in the tissue fluid.
- The substances from capillaries can easily diffuse in or diffuse out between the capillaries and the tissues fluid easily due the permeability of capillaries.
Posted by Ayaan Simon Abraham 3 years, 11 months ago
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Lakhwinder Kaur 3 years, 11 months ago
Gaurav Seth 3 years, 11 months ago
Chemcial Change
When a new substance is formed after the change, it is called chemical change. Chemical changes cannot be reversed by simple physical means. Many chemical changes are irreversible. Examples: Burning of candle, rusting of iron, etc.
Posted by Mishthi Jaisawal 3 years, 11 months ago
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Siya Panchal 3 years, 11 months ago
Mahima Mishra 3 years, 11 months ago
Yogita Ingle 3 years, 11 months ago
The ingredients present in the dal: Pulses Salt Spices Ghee Water
Posted by Ayaan Simon Abraham 3 years, 11 months ago
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Posted by ☆ Taniskasree ☆ 3 years, 11 months ago
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Yogita Ingle 3 years, 11 months ago
Lateral inversion
It is the effect produced by a plane mirror in reversing images from left to right. When an object is placed in front of a plane mirror, the right side of the object appears to be on the left side of the image and left side of the object appears to be on the right side of the image.
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