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Ask QuestionPosted by Sneha Kumari 4 years, 7 months ago
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Sarwar Mohammad 4 years, 7 months ago
Yogita Ingle 4 years, 7 months ago
A beam of light by the particles of a colloid is called the Tyndall effect. When we apply torch light on a glass of milk then the path of the light becomes visible but it is not so in case of water because in milk light is scattered by its very fine particles.
Tyndall effect can be observed when sunlight passes through the canopy of a dense forest. In the forest, mist contains tiny droplets of water, which act as particles of colloid dispersed in air.
Posted by Yash Chaudhary 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
Writing Chemical Formulae
Step 1 : Write the symbol of a basic radical (element with the positive valency) to the left hand side and that of the acid radical (element with the negative valency) to the right hand side.
Step 2 : Write the valency number/charge of each of the respective ions at the bottom of its symbol.
Step 3 : Interchange the valency number. Ignore the (+) and (-) sign.
Step 4 : Write the interchanged number.
Step 5 : Write the compound’s formula.
Step 6: Cross the reduced valencies. If 1 appears, ignore it. And if a group of atoms receive a valency number more than 1, enclose it within the brackets.
Posted by Shweta Singh 4 years, 7 months ago
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Lalit Kumar 4 years, 7 months ago
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Posted by Shweta Singh 4 years, 7 months ago
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Meghna Thapar 4 years, 7 months ago
Crop rotation is the growing of different crops on a piece of land in a pre-planned succession. Depending upon the duration, crop rotation is done for different crop combinations. The availability of moisture and irrigation facilities decides the choice of the crop to be cultivated after one harvest. Most commonly, legumes are included in the crop rotation programme to increase the soil fertility.
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Yogita Ingle 4 years, 7 months ago
- Most of the alpha particles passed through the gold foil without getting deflected.
- Very few particles were deflected from their path by 180o indicating that the whole mass of the atom is present in its centre in a very small volume.
- Few particles were deflected at small angles from their path and very few were deflected from their path by 180o indicating that the positive charge of the atom occupies very little space and is located at the centre.
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Meghna Thapar 4 years, 6 months ago
In microbiology, pleomorphism is the ability of some micro-organisms to alter their morphology, biological functions, or reproductive modes in response to environmental conditions. Pleomorphism has been observed in some members of the Deinococcaceae family.
Posted by Sheetal Sharma 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
The cells that you observed in the above activity are the basic building units of the onion bulb. The cells of onion peel are linear or rectangular in shape. All the cells are firmly bound together. Like onion, all organisms are made up of cells. Some organisms are made up of one cell while others are made up of many cells.
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Yogita Ingle 4 years, 7 months ago
| Angiosperms | Gymnosperms |
| A seed is produced by flowering plants and is enclosed within an ovary | A seed is produced by non-flowering plants and are unenclosed or naked. |
| The lifecycle of these plants are seasonal | These plants are evergreen |
| Has triploid tissue | Has haploid tissue |
| Leaves are flat in shape | Leaves are scalelike and needle-like in shape |
| Hardwood type | Softwood type |
| Reproduction rely on animals | Reproduction rely on wind |
| Reproductive system present in flowers (unisexual or bisexual) | Reproductive system present in cones and are unisexual |
Posted by Himmat Singh Chouhan 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
Potential energy is the work done to take a body to a certain height. For a body with mass m, h is the distance to which it is raised and g is the gravitational force acting on the body, then work done W is given as:
W = force * displacement
W = mg * h
∴ W = mgh
As the work done is equal to mgh which is gained by the object, potential energy Ep is given as:
Ep = mgh
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Yogita Ingle 4 years, 7 months ago
Shorter the orbit of the planet around the sun, shorter the time taken to complete one revolution. According to Kepler’s law of periods, the square of the time period of revolution (of a planet around the sun in an elliptical orbit is directly proportional to the cube of its semi-major axis).
Posted by Himanshu Thaore 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
Law of conservation of momentum states that
For two or more bodies in an isolated system acting upon each other, their total momentum remains constant unless an external force is applied. Therefore, momentum can neither be created nor destroyed
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Gaurav Seth 4 years, 7 months ago
What is a Tyndall effect?
Answer: This scattering of a beam of light by the particles of a colloid is called the Tyndall effect. When we apply torch light on a galss of milk then the path of the light becomes visible but it is not so in case of water because in milk light is scattered by its very fine particles. See the following diagram:
Tyndall effect can be observed when sunlight passes through the canopy of a dense forest. In the forest, mist contains tiny droplets of water, which act as particles of colloid dispersed in air. If is shown in the diagram below:
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