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The representation of a chemical reaction in the form of substances is known as a chemical equation. The equation in which the number of atoms of all the molecules is equal on both sides of the equation is known as a balanced chemical equation.
Law of conservation of mass governs the balancing of a chemical equation. According to this law, mass can neither be created nor be destroyed in a chemical reaction and obeying this law total mass of the elements or molecules present on the reactant side should be equal to the total mass of elements or molecules present on the product side. If the chemical equation is not balanced law of conservation is not applicable.
Posted by Moksha Sahu 3 years, 11 months ago
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Meghna Thapar 3 years, 11 months ago
The kilowatt-hour (symbolized kWh) is a unit of energy equivalent to one kilowatt (1kW) of power expended for one hour (1h) of time. The kilowatt-hour is not a standard unit in any formal system, but it is commonly used in electrical applications. Kilowatt - hour is the commercial unit of electrical energy. We have seen that power is the rate of energy consumed or delivered. If 1 joule of energy is used per second, we say that energy is used at the rate of 1 watt. A kilowatt hour (kWh) is a measure of how much energy you're using. It is simply a unit of measurement that equals the amount of energy you would use if you kept a 1,000 watt appliance running for an hour: So if you switched on a 100 watt light bulb, it would take 10 hours to rack up 1 kWh of energy.
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In a colloidal solution, the particle size is such (1 nm to 100 nm), that these particles scatter the light rays as they fall on them. Because of scattering, the path of the light as well as the particles become visible. But in a true solution, the particle size is so small (less than 1nm) that these particles are not in a position to scatter the light. Therefore, true solution does not show any Tyndall effect.
Posted by Prashant Rai 3 years, 11 months ago
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Gaurav Seth 3 years, 11 months ago
“The square of the period of orbit, divided by the cube of the radius of the orbit, is equal to a constant (Kepler's Constant) for that one object being orbited.”
In astronomy, Kepler’s laws of planetary motion are three scientific laws describing the motion of planets around the sun.
- Kepler first law – The law of orbits
- Kepler’s second law – The law of equal areas
- Kepler’s third law – The law of periods
Posted by Kumar Rohan 3 years, 11 months ago
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A tissue is defined as a cluster of cells which are similar in structure and work together to perform a particular function.
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Posted by Arunima Tripathi 3 years, 11 months ago
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It is the smallest constituent unit of matter that posses the properties of the chemical element. Atoms don’t exist independently, instead, they form ions and molecules which further combine in large numbers to form matter that we see, feel and touch.
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1)They are called digestive bags. They destroy any foreign material which enter the cell such as bacteria and virus.
2)They remove worn out and poorly working cellular organelles by digesting them to make way for their new replacements.
3)They are called suicide bags of cell.
Gaurav Seth 3 years, 11 months ago
Lysosomes
The sac-like structures in a cell surrounded by membrane are called lysosomes.
They keep the cells clean by digesting and breaking the outside materials like bacteria, food entering the cell or worn-out cell organelles into small pieces.
They can digest these organic materials due to the presence of strong digestive enzymes that can brreak down organic compounds. Therefore, lysosome is also known as a suicide sac.
Many scientists believe that lysosomes are not present in plant cells and their function of lysosomes in plants is performed by vacuole.
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“Brownian motion refers to the random movement displayed by small particles that are suspended in fluids. It is commonly referred to as Brownian movement”. This motion is a result of the collisions of the particles with other fast-moving particles in the fluid.
Brownian motion is named after the Scottish Botanist Robert Brown, who first observed that pollen grains move in random directions when placed in water.
- The size of the particles is inversely proportional to the speed of the motion, i.e. Small particles exhibit faster movements.
- This is because the transfer of momentum is inversely proportional to the mass of the particles. Lighter particles obtain greater speeds from collisions.
- The speed of the Brownian motion is inversely proportional to the viscosity of the fluid. The lower the viscosity of the fluid, the faster the Brownian movement.
- Viscosity is a quantity that expresses the magnitude of the internal friction in a liquid. It is the measure of the fluid’s resistance to flow.
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ᵗʰⁱˢ ᵍⁱʳˡ ⁱˢ ༒︎Dᴇᴀᴅ Iɴsɪᴅᴇ༒︎✔︎ 3 years, 11 months ago
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Posted by Kumar Rohan 3 years, 11 months ago
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Cells are the basic, fundamental unit of life. So, if we were to break apart an organism to the cellular level, the smallest independent component that we would find would be the cell.
Posted by Neha Jangid ??? 3 years, 11 months ago
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- Apical Meristems – These meristems are located on the tip of the root, stem etc. They help in the growth of the root system as well as the shoot system. The various cell divisions along with the cellular enlargement help in the growth of the stem above the ground and the growth of the root below the ground.
- Intercalary Meristems – The intercalary meristems are located at the internodes or the base of the leaves. The intercalary meristems help in increasing the length of the internode. This is usually seen in monocotyledonous plants.
Posted by Dildar Khan 3 years, 11 months ago
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Yogita Ingle 3 years, 11 months ago
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Mitosis |
Meiosis |
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It is a type of cell division in which the daughter cells formed have exactly the same number of chromosomes as the parent cell. |
It is a type of cell division in which the number of chromosomes is reduced by half through the separation of homologous chromosomes in a diploid cell |
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Two daughter cells are formed at the end of mitosis. |
Four daughter cells are formed at the end of meiosis. |
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The steps of mitosis are Interphase, Prophase, Metaphase, Anaphase, Telophase, and Cytokinesis |
The steps of meiosis are Interphase, Prophase I, Metaphase I, Anaphase I, Telophase I, Prophase II, Metaphase II, Anaphase II, Telophase II |
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Crossing over does not occur |
Crossing over occurs |
Posted by Kritika Agarwal 3 years, 11 months ago
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ANSWER Water is called the "universal solvent" because it dissolves more substances than any other liquid. This is important to every living thing on earth. It is called the Elixir of life.water is a solvent due to the polarity of each water molecule. The hydrogen side of each water (H2O) molecule carries a slight positive electric charge, while the oxygen side carries a slight negative electric charge. This helps water dissociate ionic compounds into their positive and negative ions. The positive part of an ionic compound is attracted to the oxygen side of water while the negative portion of the compound is attracted to the hydrogen side of the water.
Posted by Krish Solanki 3 years, 11 months ago
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Commercial unit of energy is kilowatt hour (kWh).
The SI unit of energy is joule.
1 kWh = 3.6x {tex} ${{10}^{6}}$J{/tex}
(ii) Given, P = 2500 W, t = 4 h
E = P/T = 2500/ 1000 x 4 = 10 kwH = 10 units.
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