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Ask QuestionPosted by Fahad Malik 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
A band of colors, as seen in a rainbow, produced by separation of the components of white light by their different degrees of refraction according to wavelength, is called the spectrum of white light. The colours which appear in the spectrum of white light are violet, indigo, blue, green, yellow, orange, and red (VIBGYOR).
Posted by Harsh Patel 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
Crop rotation : crop rotation is the practice of growing a series of different types of crops in the same area in sequential seasons.
Advantages of crop rotation:
- It help in reducing the pests build up.
- Reduces soil erosion.
- Helps in control weeds.
- It prevents diseases.
Posted by Abhay Singh Thakur 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
Model for the structure of an atom had been first proposed by J.J. Thomson. Later, followed many theories however, Rutherford's model was finally accepted as the correct nuclear model. Rutherford had shown his model with help of an experiment.
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Gaurav Seth 7 years, 1 month ago
| Healthy | Disease-free |
|
1. It is a state of physical, mental and social well being. |
1. It is a state of absence of any discomfort or derangement of the functioning of the body. |
| 2. It refers not only to the individual but also its social and community environment. | 2. It refers to the individual. |
| 3. A ‘healthy’ individual is one who is able to perform normal under given situation. | 3. A ‘disease-free’ individual may have good health or poor health |
Swapneswar Jena 7 years, 1 month ago
Posted by Karan Sandhu 7 years, 1 month ago
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Gaurav Seth 7 years, 1 month ago
MODIFICATIONS THAT WERE INTRODUCED BY CARL WOESE ARE
Robert Whittacker classified organisms based into five kingdoms, among which monera kingdom consisted the most primitive organisms.
Later Carl Woese classified monera kingdom into two sub kingdoms .
Thay are-
1- ARCHAEBACTERIA
2-EUBACTERIA.
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Meghna Thapar 6 years, 1 month ago
- The Solid State:
Properties of solids:
- Solids have a fixed shape and a fixed volume.
- Solids cannot be compressed much.
- Solids have high densities. They are heavy.
- Solids do not fill their container completely.
- Solids do not flow.
- The Liquid State:
Properties of liquids:
- Liquids have a fixed volume but they have no fixed shape.
- Like solids, liquids cannot be compressed much.
- Liquids have moderate to high densities. They are usually less dense than solids.
- They do not fill their container completely.
- They generally flow easily.
The aquatic animals can breathe under water due to the presence of dissolved oxygen in water. Thus, we may conclude that solids, liquids and gases can diffuse into liquids. The rate of diffusion of liquids is higher than that of solids. This is due to the fact that in the liquid state, particles move freely and have greater space between each other as compared to particles in the solid state.
- The Gaseous State:
Properties of gases:
- Gases have neither a fixed shape nor a fixed volume.
- They can be compressed easily.
- They have low densities.
- They fill their container completely.
- They flow easily.
The process of a liquid changing into vapour even below its boiling point is called evaporation. Whereas the temperature at which a liquid starts boiling at the atmospheric pressure is known as its boiling point.
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Poorvi Jain 7 years, 1 month ago
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