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Ask QuestionPosted by Mansi Sawarbandhe 5 years, 3 months ago
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Posted by Harshika Yadav 5 years, 3 months ago
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Kamya Gandhi 5 years, 3 months ago
Yogita Ingle 5 years, 3 months ago
The phenomenon by which the colloidal particles are in continuous motion is called BROWNIAN MOVEMENT.
BROWNIAN movement was named after Robert brown a biologist. He observed the motion of the particles in suspension of pollen grain s in water.
Posted by Lija Gigi 5 years, 3 months ago
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Posted by Muskan Singh 5 years, 3 months ago
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Posted by Bisma Khan 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
An element with valency 3 can be written as X=+2
It is given that it forms an oxide which means it will react with oxygen which has a valency of 2. The “valency of oxygen” is written as O=-2.
We now use the criss-cross method of finding the valency of the oxide.
So we get , Which is the required formula of oxide.
Kamya Gandhi 5 years, 3 months ago
Posted by Kamya Gandhi 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
Hooke's 1665 book Micrographia, describing observations with microscopes and telescopes, as well as original work in biology, contains the earliest of an observed microorganism, a microfungus Mucor.
Posted by Harshika Yadav 5 years, 3 months ago
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Chhavi Sharma 5 years, 3 months ago
Yogita Ingle 5 years, 3 months ago
The phenomenon of scattering of light by particles in a colloid or in a very fine suspension is called tyndall effect. The individual suspension particles scatter and reflect light, making the beam visible. The amount of scattering depends on the frequency of the light and density of the particles. As with Rayleigh scattering, blue light is scattered more strongly than red light by the Tyndall effect. Another way to look at it is that longer wavelength light is transmitted, while shorter wavelength light is reflected by scattering.
Examples of tyndall effect: Shining a flashlight beam into a glass of milk, The visible beam of headlights in fog is caused by the Tyndall effect. The water droplets scatter the light, making the headlight beams visible.
Abnish Kumar 5 years, 3 months ago
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Harman Kaur 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
It is the ability of an atom to gain or lose electron in order to achieve the noble gas configuration. It refers to the ability of an element to combine with other element. It is obtained by determining the number of electrons in the outermost shell (also called valence shell) of each atom of an element. For instance, sodium has 1 electron in its outermost shell and hence valency of sodium is 1.
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Posted by Rengavadivelammal .C 5 years, 3 months ago
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Meghna Thapar 5 years, 3 months ago
Basis for Comparison |
Communicable diseases |
Non-communicable diseases |
| Definition | Communicable diseases are the diseases that are caused by infectious agents and can be transmitted from an infected person to other people, animals, or other sources in the environment. | Non-communicable diseases are the diseases that are not transferred from an infected person to another via any means and are mostly caused by factors like improper lifestyle and eating habits. |
| Also called | Communicable diseases are also known as infectious diseases. | Non-communicable diseases are also known as chronic diseases. |
| Progression | These are more likely to be acute, meaning they appear quickly. | These are more likely to be chronic, meaning they last for a longer period of time and progress gradually. |
| Seasonal | Some infectious diseases might be seasonal. | Non-communicable diseases are not seasonal and might occur at any time of the year. |
Posted by Diya Sarma 5 years, 3 months ago
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Posted by Vinod Kumar 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
Let the distance travelled by the object be “s”.
We know that,
→Distance = Average velocity × time
→Average velocity = (u+v)/2
Then s=(u+v)/2×t
According to first equation if motion,
v = u + at
substituting the value of v in above equation
s = (u+u+at)/2 x t
→s = (2u+at)/2 × t
→s = (2ut+at²)/2
→s = 2ut/2 + at²/2
→s=ut+1/2at²
Hence derived.
Posted by Sowparnika Ram 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
- Inertia is the natural tendency of an object to resist a change in its state of motion or of rest.
- The mass of an object is a measure of its inertia.
- A force that is just enough to cause a small cart to pick up a large velocity will produce a negligible change in the motion of a train, because of train’s large inertia.
Posted by Palak Pandey 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
Glandular Epithelium – These are modified columnar epithelial tissues. They are large cells that present in the tear glands, sweat glands etc. Their main function is secretion.
Posted by Palak Pandey 5 years, 3 months ago
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Posted by Palak Pandey 5 years, 3 months ago
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Meghna Thapar 5 years, 3 months ago
- Protoplasm is the physical phase of life.
- All protoplasm composed of carbon, hydrogen, oxygen and nitrogen form the basis for all. They are also constituents of carbon dioxide, water and nitrogen compounds essential for life.
- Huxley emphasised on the above theory and has supported the fact that protoplasm is the physical phase of life and forms the basis for our life.
- These new compounds, like the elementary bodies, are lifeless. But when brought together under certain circumstances, they give rise to the still complex body.
- Hence, protoplasm is referred to as the physical phase of life.
Posted by V Kumar Tripathi 5 years, 3 months ago
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Shree Kushwaha 5 years, 3 months ago
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The term latent heat of vaporisation can be defined as the amount of heat needed for the conversion of 1kg of liquid at its boiling point to gas at same temperature. It differs among different liquids.
Posted by Shruti Padhan 5 years, 3 months ago
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Harman Kaur 5 years, 3 months ago
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Pradeep Mehta 5 years, 3 months ago
1Thank You