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Ask QuestionPosted by Ankit Kanojiya 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
The pressure exerted by a gas uniformly across the surface of a container can be described by simple kinetic theory. The particles of a gas are constantly moving in random directions and frequently collide with the walls of the container and/or each other. The sum of all the normal components of force exerted by the particles impacting the walls of the container divided by the area of the wall is defined to be the pressure.
Posted by Ayush Paswan 5 years, 3 months ago
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Ayush Paswan 5 years, 3 months ago
Posted by Dass Angel 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
Evaporation is known as the process of water changing from liquid to gas or vapour. As in it occurs on the surface of a liquid when it turns into the gaseous phase. It is an endothermic process when the heat is absorbed.
Posted by Tisya Kushwaha 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
The mass per unit volume of a substance is called density (density = mass/volume). As the volume of a substance increases, its density decreases.
Liquids have lower density than that of solids. Water is also a liquid so it should also have less density than that of solid that is ice.
Though ice is a solid, but it has a cage like structure hence there are large number of empty spaces between its particles. These spaces are larger as compared to the spaces present between the particles of water. Thus for a given mass of water, volume of ice is greater than that of water. Hence, the density of ice is less than that of water. A substance with lower density than water can float on water. Therefore, ice floats on water.
Posted by Himanshi Singh 5 years, 3 months ago
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Meghna Thapar 5 years, 3 months ago
If the displacement of an object is proportional to the square of the time taken then the body is moving with uniformly accelerated motion as it will follow Newton's second equation of motion for a particular initial velocity, which can be given by, s=ut+1/2at2. The direction of motion of an object at any point in space is determined by its instantaneous velocity at that point. The acceleration is a measure of the change of velocity in unit time at that point which need not be in the same direction as the direction of the motion of the object.
Posted by Yashi ?? 5 years, 3 months ago
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Meghna Thapar 5 years, 3 months ago
There are many different types, sizes, and shapes of cells in the body. For descriptive purposes, the concept of a "generalized cell" is introduced. It includes features from all cell types. A cell consists of three parts: the cell membrane, the nucleus and, between the two, the cytoplasm. Within the cytoplasm lie intricate arrangements of fine fibers and hundreds or even thousands of miniscule but distinct structures called organelles.
Posted by Mariya Stalin 5 years, 3 months ago
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Suhani Sabat 5 years, 3 months ago
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Posted by Megha Raj 5 years, 3 months ago
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Posted by Palak Prajapati 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
Multicellular organisms are made up of millions and trillions of cells. All these cells perform specific functions. All the cells specialised for performing similar functions are grouped together as tissues in the body. Hence, a particular function is carried out by a group of cells at a definite place in the body. Similarly, different functions are carried out by different groups of cells in an organism and this is known as the division of labour in multicellular organisms.
Posted by Mohvijay Jain 5 years, 3 months ago
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Posted by Purnika Sengupta 5 years, 3 months ago
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Alakananda Sanjith 5 years, 3 months ago
Yogita Ingle 5 years, 3 months ago
These are the four main characteristics of particles of matter :
- Particles of matter are very tiny in size.
- They have spaces between them.
- Particles of matter move constantly.
- They are attracted towards each other.
Posted by Krish Mishra 5 years, 3 months ago
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Posted by Smriti Garg 5 years, 3 months ago
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Meghna Thapar 5 years, 3 months ago
In healthy, dividing human cells, each of these chromosomes is duplicated and one copy passed to each of the two daughter cells. However, if this process is disturbed, daughter cells receive an unequal number of chromosomes, a state that is known to drive normal cells to become cancerous. If they do not align correctly, they cannot move individually to opposite poles in the later phases of mitosis, and the result will be one cell with extra chromosomes and a daughter cell with missing chromosomes. These mutations can lead to harmful results such as cell death, organic disease or cancer.
Posted by Siddhant Sharma 5 years, 3 months ago
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Meet.B. Dattani 5 years, 3 months ago
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Posted by Gaurangi Sharma✒✒✒✒ 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
- Meiosis is the form of nuclear cell division that results in daughter cells that have one half the chromosome numbers as the original cell.
- In organisms that are diploid, the end result is cells that are haploid. Each daughter cell gets one complete set of chromosomes, i.e., one of each homologous pair of chromosomes.
- In humans, this means the chromosome number is reduced from 46 to 23.
- The only cells that undergo meiosis will become sperm or eggs.
- Mitosis is a continuum process of cell division which occurs in all types of living cells.
- Mitosis involves four basic phases – prophase, metaphase, anaphase and telophase.
- Mitosis is the process where the division of cell occurs by asexual reproduction.
- In mitosis, the nuclear membrane is broken down, spindle fibres (microtubules) attach to the chromatids at the centromere and pull apart the chromatids.
Posted by Gaurangi Sharma✒✒✒✒ 5 years, 3 months ago
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Posted by Siddhant Malik 5 years, 3 months ago
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Meghna Thapar 5 years, 3 months ago
The burning of fossil fuels, in both energy plants and vehicles, releases massive amounts of carbon dioxide into the atmosphere, causing climate change. Industrial processes also emit particulate matter, such as sulfur dioxide, carbon monoxide and other noxious gases. Environmental risk factors, such as air, water and soil pollution, chemical exposures, climate change, and ultraviolet radiation contribute to more than 100 diseases and injuries.
Posted by Siddhant Malik 5 years, 3 months ago
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Yashika Choudhary 5 years, 3 months ago
Yogita Ingle 5 years, 3 months ago
The DNA present in the mitochondria of the cell is termed as mitochondrial DNA.
Posted by Siddhant Malik 5 years, 3 months ago
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Gaurav Seth 5 years, 3 months ago
1. Air, water, land and noise pollution has greatly affected the environment. Environmental pollution has
affected humans, animals, plants and ecosystem.
2. Interference in cyclic flow of materials from abiotic environment to the biosphere and food webs affects ecological balance.
3. The depletion of ozone layer allows entering of UV
rays from sun into the earth's atmosphere which is
associated with a number of health related and
environmental issues such as skin cancer, eye damage, The depletion of ozone layer has effects in the form of global warming, which in turn leads to melting of polar ice, which will lead to rising sea levels and climatic changes around the world.
4. Environmental degradation has a host of negative outcomes that effect human beings both directly and indirectly such as increased poverty, famine, weather extremes and species loss.
5. Garbage causes damage to local ecosystems, and it is a threat to plant and animal life.
Posted by Jakkula Rithvika 5 years, 3 months ago
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Aman Maurya 5 years, 3 months ago
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