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Ask QuestionPosted by Suhani Rana 5 years, 2 months ago
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Yogita Ingle 5 years, 2 months ago
J. E. Purkinje in the year 1839 coined the term 'protoplasm' for the fluid substance of the cell.
Posted by Suhani Rana 5 years, 2 months ago
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Yash Dhyani 5 years, 2 months ago
Anchal Mishra 5 years, 2 months ago
Posted by Yogendra Kanwar 5 years, 2 months ago
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Ayush Nayak 5 years, 2 months ago
Suhani Rana 5 years, 2 months ago
Posted by Bani Tuteja 5 years, 2 months ago
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Yogita Ingle 5 years, 2 months ago
Tincture of iodine is an antiseptic which is used for cleaning the cuts. It is also known as iodine tincture or as weak iodine solution. The composition of tincture of iodine is 2-7% of elemental iodine and rest with either potassium iodide or sodium iodide.
The solvent is alcohol and water while the solute is iodine.
Posted by The Soultaker?♂️?♂️ 5 years, 2 months ago
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Suhani Rana 5 years, 2 months ago
Posted by Vasu Singh 5 years, 2 months ago
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Meghna Thapar 5 years, 2 months ago
The process by which cells or parts of an organism change during development to serve a specific function. The cells of an animal in its early embryonic phase, for example, are identical at first but develop by differentiation into specific tissues, such as bone, heart muscle, and skin. Differentiation in (developmental biology) refers to the normal process by which a less specialized cell undergoes maturation to become more distinct in form and function. It is also called cell differentiation.
Posted by Tanisha Dahiya 5 years, 2 months ago
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Yogita Ingle 5 years, 2 months ago
1. Liquids which do not mix with each other and form separate layers are called immiscible liquids.
2. They are separated by using separating funnel.
Posted by Krrish Moses 5 years, 2 months ago
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Anshika Dwivedi 5 years, 2 months ago
Posted by Supreet Samal 5 years, 2 months ago
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Md. Taushif Alam 5 years, 2 months ago
Posted by Basavaraj Kallundi 5 years, 2 months ago
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Meghna Thapar 5 years, 2 months ago
In physics, a charged particle is a particle with an electric charge. It may be an ion, such as a molecule or atom with a surplus or deficit of electrons relative to protons. An atom is a small particle (piece) of matter. It is made up of even smaller particles called protons, which carry a positive (+) electrical charge; neutrons, which have no charge; and electrons, which have a negative (-) charge.
Posted by Ananya Raj 5 years, 2 months ago
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Meghna Thapar 5 years, 2 months ago
- The new substances produced as a result of chemical reaction are called products.
- The method of representing a chemical reaction with the help of symbols and formulae of substances involved in it is called a chemical equation.
- A balanced chemical equation has an equal number of atoms of different elements in the reactants and products.
- An unbalanced chemical equation has unequal number of atoms of one or more elements in the reactants and products.
- Those reactions in which two or more substances combine to form a single substance is called a combination reaction.
- Those reactions in which a compound splits up into two or more simpler substances is called a decomposition reaction.
- Those reactions in which one element takes the place of another element in a compound, are known as displacement reactions.
- Those reactions in which two compounds react by an exchange of ions to form two new compounds are called double displacement reactions.
- Reactions which involve the addition of oxygen or the removal of hydrogen are called oxidation reactions.
Posted by Nishi Baxla 5 years, 2 months ago
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Anchal Mishra 5 years, 2 months ago
Yogita Ingle 5 years, 2 months ago
- Prokaryotes are the organisms, that lack membrane-bound organelles while eukaryotes have these organelles.
- ER is a eukaryotic organelle with a network of tubules, vesicles, and cisternae within the cells.
- Ribosomes are the nonmembrane bound organelles and are found in both prokaryotes and eukaryotes.
- DNA is the genetic material present in both prokaryotes and eukaryotes.
Posted by Nishi Baxla 5 years, 2 months ago
- 1 answers
Yogita Ingle 5 years, 2 months ago
Evaporation is the process in which a liquid state of matter (water) is converted into a gaseous state of matter (vapor).
Examples of evaporation:
- Crystallization
- Drying of clothes
Following are the factors that affect the evaporation:
- Temperature: As the temperature increases, the rate of evaporation also increases. Temperature and rate of evaporation are proportional to each other
- Surface area: As the surface area increases, the rate of evaporation increases. The surface area and rate of evaporation are proportional to each other.
- Humidity: The rate of evaporation decreases with an increase in humidity. Humidity and the rate of evaporation are inversely proportional to each other.
- Wind speed: Increase in wind speed results in increased evaporation. Wind speed and rate of evaporation are proportional to each other.
Posted by Bilal Saleem 5 years, 2 months ago
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Yogita Ingle 5 years, 2 months ago
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A molecule is a collection of various atoms that combine chemically with each other.
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These atoms are bound together by certain forces of attraction.
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Atoms of the same elements or different elements can bind together to form molecules.
Posted by Technical Boy 5 years, 2 months ago
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Posted by Seema Dasaur 5 years, 2 months ago
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Yogita Ingle 5 years, 2 months ago
Speed = 90km/h = 25m/s
Distance = 25m
0-625 = 50a
a = -12.5m/s2
0 = 25 - 12.5t
t = 250/125 = 4sec
Posted by M Khan 5 years, 2 months ago
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Posted by Vrushabh Nipane 5 years, 2 months ago
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Posted by Subramani Gr 5 years, 2 months ago
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Meghna Thapar 5 years, 2 months ago
The slope of a velocity graph represents the acceleration of the object. So, the value of the slope at a particular time represents the acceleration of the object at that instant. The slope of a velocity-time graph is acceleration. The slope of a linear function. The steepness of a hill is called a slope. The same goes for the steepness of a line. The slope is defined as the ratio of the vertical change between two points, the rise, to the horizontal change between the same two points, the run. If the acceleration is positive, then the line is an upward sloping line (i.e., the slope is positive). If the acceleration is negative, then the velocity-time graph is a downward sloping line (i.e., the slope is negative).
Posted by Aasha Pathak 5 years, 2 months ago
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Meghna Thapar 5 years, 2 months ago
The physical state of water at its boiling point temperature of 100 degree Celsius will be both liquid state as well as gaseous state. This is because at its boiling point of 100 degree celsius the liquid state of water starts changing into its Gaseous state (steam). At 0°C, solid-state. We know that the freezing point of water is 0 °C. The liquid form of water starts to become solid (ice) at this temperature. Water is unique because the properties of water allow it to exist in all three states of matter! Water is usually a liquid, but when it reaches to 32° Fahrenheit (F), it freezes into ice. (Ice is the solid state of water.)
Posted by Lamha Verma 5 years, 2 months ago
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R. Atharv 5 years, 2 months ago
Posted by Satya Debbarma 5 years, 2 months ago
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Meghna Thapar 4 years, 10 months ago
The shortest distance measured from the initial to the final position of an object is known as the displacement.
For motion of the object from O to A, the distance covered is 60 km and the magnitude of displacement is also 60 km. During its motion from O to A and back to B, the distance covered = 60 km + 25 km = 85 km while the magnitude of displacement = 35 km.
Thus, the magnitude of displacement (35 km) is not equal to the path length (85 km). If we consider the object to travel back to O, the final position concides with the initial position, and therefore, the displacement is zero. However, the distance covered in this journey is OA + AO = 60 km + 60 km = 120 km. Thus, two different physical quantities — the distance and the displacement, are used to describe the overall motion of an object and to locate its final position with reference to its initial position at a given time.
Posted by Chitralekha Khaund 5 years, 2 months ago
- 2 answers
Gaurav Seth 5 years, 2 months ago
Activity:
1. Take some ammonium chloride. Crush it and put it in a china dish.
2. Put an inverted funnel over the china dish.
3. Put a cotton plug on the stem of the funnel, as shown in the diagram below.
4. Now, heat the china dish slowly with the help of a Bunsen burner and observe.
5. Ammonium chloride which is in the solid state on exposure to heat will directly change into the vapour state.
6. The vapours on rising up in the funnel will start condensing and form crystals of ammonium chloride.
Posted by Chitralekha Khaund 5 years, 2 months ago
- 1 answers
Gaurav Seth 5 years, 2 months ago
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Evaporation
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Boiling
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Takes place at all temperatures.
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Boiling occurs at a particular temperature.
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Evaporation takes place from the surface.
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In boiling, the entire liquid boils.
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Can occur using the internal energy of the system.
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Boiling requires an external source of heat.
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Evaporation produces cooling.
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Boiling does not.
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It is a slow process.
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Boiling is a rapid process. |
Posted by Chitralekha Khaund 5 years, 2 months ago
- 1 answers
Gaurav Seth 5 years, 2 months ago
a)Take out a bottle of soft drink from the refrigerator and place it on the table. b)Observe it for few minutes.
c)you will see small drops of water appearing on the outer surface of the bottle.
d) This is because water vapour present in the air condenses and forms small drops of water.
e) This activity proves that air contains water vapour.
Posted by Harojit Saha 5 years, 2 months ago
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Madhav Grover 5 years, 2 months ago
Posted by Anchal Kumari 5 years, 2 months ago
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Rashamjot Kaur 5 years, 2 months ago
Kanav Dumra 5 years, 2 months ago
Posted by Prakhar Gupta 5 years, 2 months ago
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Yogita Ingle 5 years, 2 months ago
Hybridisation refers to crossing between genetically dissimilar plants. This crossing may be intervarietal (between different varieties), interspecific (between two different species of the same genus) or intergeneric (between different genera).
Posted by Bitter Truth 5 years, 2 months ago
- 2 answers
Kanav Dumra 5 years, 2 months ago
Yogita Ingle 5 years, 2 months ago
A substance is a pure single form of matter. It cannot be separated into other kinds of matter by any physical process. For example: Sugar, sodium chloride.
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