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Yogita Ingle 7 years, 4 months ago
The dissolved salt increases the mass of the water without increasing its volume, so salt water is generally denser than fresh water. This means the buoyant force on a submerged or partially submerged object is greater in salt water than in fresh water. In other words, it's easier to float in salt water than in fresh water (or, you sink faster in fresh water than in salt water).
Posted by Anvita Baranwal 7 years, 4 months ago
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Yogita Ingle 7 years, 4 months ago
Golgi body is called the traffic police of cell because it acts as a way station or a assembly area for the storage ,processing and packaging for various cellular secretions. It also packages material synthesised by cell and dispatch them either to intracellular or extra cellular targets such as zymogens.
Posted by Likhita Shetty 7 years, 4 months ago
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Posted by Harshit Srivastava 7 years, 4 months ago
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Yogita Ingle 7 years, 4 months ago
Covalency: The number of electrons that an atom can shared to get stable electronic configuration is called it covalency.
Ex: In order to get stable Neon gas configuration Carbon shares its four valence electrons. Thus its covalency is 4.
Posted by Hitesh Maan 7 years, 4 months ago
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Rishabh 2909 7 years, 4 months ago
Yogita Ingle 7 years, 4 months ago
Neils Bohr, a Danish physicist, in 1913 proposed model of atom which rectified the problems left by Rutherford’s Model. He proposed that
- Electrons revolve round the nucleus in a fixed orbit.
- He called these orbits as ‘stationary orbit’.
- Each stationary orbit is associated with fixed amount of energy, thus electrons do not radiate energy as long as they keep on revolving around the nucleus in fixed orbit.
Posted by Krishna Das 7 years, 4 months ago
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Yogita Ingle 7 years, 4 months ago
Power = Force × Displacement / Time
Power = Force ×(Displacement / Time)
Power = Force × Velocity
Power =Mass × acceleration × Velocity
Posted by Satish Patel 7 years, 4 months ago
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Yogita Ingle 7 years, 4 months ago
Most agriculture in India is rain-fed, that is, the success of crops in most areas is dependent on timely monsoons and sufficient rainfall spread through most of the growing season. The extra water required by crops is met through irrigation.
The process of supplying water to crop plants through human efforts by means of canal, wells, reservoirs, tube-wells etc., is known as irrigation.
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Yogita Ingle 7 years, 4 months ago
Relative density of a substance = Density of the substance/Density of water at 4°C As relative density is the ratio of densities, it has no units. (Both the numerator and the denominator have the same units, they cancel each other. )
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Yogita Ingle 7 years, 4 months ago
A bioindicator is a living organism that gives us an idea of the health of an ecosystem. Some organisms are very sensitive to pollution in their environment, so if pollutants are present, the organism may change its morphologyphysiology or behaviour, or it could even die. One example of a bioindicator is lichens.
Posted by Vivek Mishra 7 years, 4 months ago
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Yogita Ingle 7 years, 4 months ago
Frequency is a property of a wave. We are surrounded by waves every day. Light is an electromagnetic wave, and the sound of the fan in your computer is a sound wave. A wave is a vibration that carries energy with it. The frequency of a wave is the number of waves that pass by each second, and is measured in Hertz (Hz). For example, a sound wave might have a frequency of 450 Hz.
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Kamlesh Singh 7 years, 4 months ago
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