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Ask QuestionPosted by Hanshika (Honey) 5 years, 1 month ago
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Hanshika (Honey) 5 years, 1 month ago
Madhusmita Sahu 5 years, 1 month ago
Posted by Ishita Agrawal 5 years, 1 month ago
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Meghna Thapar 5 years, 1 month ago
The main sources of pollution are household activities, factories, agriculture and transport. Once they have been released into the environment, the concentration of some pollutants is reduced by dispersion, dilution, deposition or degradation. Pollution can take the form of chemical substances or energy, such as noise, heat or light. Pollutants, the components of pollution, can be either foreign substances/energies or naturally occurring contaminants. Pollution is often classed as point source or nonpoint source pollution.
Posted by Shruti Agrawal 5 years, 1 month ago
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Gaurav Seth 5 years, 1 month ago
Nature of liquid : There are two types of liquid according to the nature of evaporation.
1) Volatile
2) Non Volatile
Volatile liquids have much higher evaporation rate than the non volatile liquids. Volatile liquid can evaporate in very short amount of time even in the room temperature and the non volatile liquid needs external heat application for evaporation.
Yogita Ingle 5 years, 1 month ago
Nature of liquid : There are two types of liquid according to the nature of evaporation.
1) Volatile
2) Non Volatile
Volatile liquids have much higher evaporation rate than the non volatile liquids. Volatile liquid can evaporate in very short amount of time even in the room temperature and the non volatile liquid needs external heat application for evaporation.
Posted by Madhusmita Sahu 5 years, 1 month ago
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Madhusmita Sahu 5 years, 1 month ago
Devansh Tiwari 5 years, 1 month ago
Madhusmita Sahu 5 years, 1 month ago
Posted by Anushka Singh 5 years, 1 month ago
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Madhusmita Sahu 5 years, 1 month ago
Yogita Ingle 5 years, 1 month ago
The invention of the electron microscope by Max Knoll and Ernst Ruska at the Berlin Technische Hochschule in 1931 finally overcame the barrier to higher resolution that had been imposed by the limitations of visible light.
Posted by Sneha Singh 5 years, 1 month ago
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Yogita Ingle 5 years, 1 month ago
15% acid = 15g/100ml
Density is 1.02g/ml, so that makes 15gm in 102gm of solution
Now subtracting the weight of acid from the total weight of the solution
= 102 g – 15 g
= 87 g of water
To find out how much acid is present in 100g of water, we do the following,
100ml x 87g /15g
= 17.24/100 g of water
The density of water is said to be 1g/ml, therefore its concentration will be 17.24/100 ml or 100g of water
Hence,
The mass by volume percentage of H2SO4 will be 17.24% w/w
Posted by Sneha Singh 5 years, 1 month ago
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Gaurav Seth 5 years, 1 month ago
Given volume of solvent = 70 mL
Given volume of solute = 5 mL
Total volume of solution = 70 + 5 = 75 mL
Volume percent = ( volume of solute ) / ( volume of solution ) * 100
= (5 / 75) * 100
= 6.67 %
Posted by Jasmine Kaur 5 years, 1 month ago
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Yogita Ingle 5 years, 1 month ago
To concert Kelvin scale into Celsius scale we have to subtract 273 so
(a) 303K = 303 - 273 = 30 ºC,
(b) 570K = 570-273 = 297 ºC
Posted by Jasmine Kaur 5 years, 1 month ago
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Madhusmita Sahu 5 years, 1 month ago
Yogita Ingle 5 years, 1 month ago
Temperatures can be converted from Celsius to Kelvin by adding 273 to the the Celsius Scale.
We have been given 3 temperatures here which are in the Celsius Scale.
25°C, 38°C and 66°C
To convert all of them to the Kelvin Scale, add 273 to all of them.
25 + 273 = 298 K
38 + 273 = 311 K
66 + 273 = 339 K
Read more on Brainly.in - https://brainly.in/question/12484519#readmore
Posted by Sneha Singh 5 years, 1 month ago
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Yogita Ingle 5 years, 1 month ago
Mass of solute (salt)=40 g
Mass of solvent (water)=320 g
We know,
Mass of solution =Mass of solute +Mass of solvent
=40g+320g
=360 g
Mass percentage of solution
=Mass of solute /Mass of solution ×100
= 40/360 × 100 =11.1%
Posted by Shweta Sharma 5 years, 1 month ago
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Madhusmita Sahu 5 years, 1 month ago
Posted by Jasmine Kaur 5 years, 1 month ago
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Suzanne Smitha 5 years, 1 month ago
Hanshika (Honey) 5 years, 1 month ago
Madhusmita Sahu 5 years, 1 month ago
Posted by Madhusmita Sahu 5 years, 1 month ago
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Hanshika (Honey) 5 years, 1 month ago
Posted by Madhusmita Sahu 5 years, 1 month ago
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Suzanne Smitha 5 years, 1 month ago
Hanshika (Honey) 5 years, 1 month ago
Posted by Madhusmita Sahu 5 years, 1 month ago
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Yogita Ingle 5 years, 1 month ago
The melting point and the freezing point are usually the same temperature. The melting point is the temperature at which a solid turns into a liquid, while the freezing point is the temperature at which a liquid turns into a solid. The transition of matter is same. For water, it is 0 degrees Celsius. When a block of ice is heated above 0 degrees Celsius, it melts, while a glass of water is cooled below 0 degrees Celsius it freezes. There are a few substances that have different melting and freezing points. Example, agar melts at 85 degrees Celsius but freezes between 32 and 40 degrees Celsius. That is called “hysteresis,” and it’s not very common phenomenon.
Posted by Abhishek Anand 5 years, 1 month ago
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Gaurav Seth 5 years, 1 month ago
1 . Name types of simple tissues .
Ans . The types of simple tissues are parenchyma, collenchyma, sclerenchyma and aerenchyma
Parenchyma is divided into two types :
- Chlorenchyma
- Aerenchyma.
Posted by Shraddha Verma 5 years, 1 month ago
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Madhusmita Sahu 5 years, 1 month ago
Devansh Tiwari 5 years, 1 month ago
Madhusmita Sahu 5 years, 1 month ago
Posted by Dhanyatha S Maddodi 5 years, 1 month ago
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Gaurav Seth 5 years, 1 month ago
Increase in the pressure on the surface of a gas decreases the volume of the gas with increasing its density. The particles start moving in straight lines and also collide with the wall of the container and this collision enhances the inter particle forces and increases the fluidization behaviour.
We know that the particle of gas are very far apart which means there is a large gap between the particle. So, when pressure is applied, these gas particle come close to one another. When these particles come closer, the force of attraction comes into play and the gaseous state change into liquid state. When some more pressure is applied the liquid state further changes into solid state.
Posted by Mohit Gakhar 5 years, 1 month ago
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Posted by Deeya.J.S Nair 5 years, 1 month ago
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Posted by Soumya Shrivas 5 years, 1 month ago
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Anmol Dwivedi 5 years, 1 month ago
Suzanne Smitha 5 years, 1 month ago
Posted by Aishwarya Satish 5 years, 1 month ago
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Meghna Thapar 4 years, 10 months ago
- Equation For Velocity-Time Relation:
Consider the velocity-time graph of an object that moves under uniform acceleration. Initial velocity of the object is u and then it increases to v in time t. The velocity changes at a uniform rate a.
The perpendicular lines BC and BE are drawn from point B on the time and the velocity axes respectively, so that the initial velocity is represented by OA, the final velocity is represented by BC and the time interval t is represented by OC. BD = BC – CD, represents the change in velocity in time interval t.
Let us draw AD parallel to OC. From the graph, we observe that BC = BD + DC = BD + OA
Substituting BC = v and OA = u,
we get v = BD + u i.
or BD = v – u ii.
From the velocity-time graph,
The acceleration of the object is given by a = Change in velocity/time taken
= BD/AD = BD/OC
Substituting OC = t, we get
a = BD/t
BD = at iii.
Using the equations ii. & iii. We get,
v = u + at
- Equation For Position - Time Relation:
Let us consider that the object has travelled a distance s in time t under uniform acceleration a. The distance travelled by the object is obtained by the area enclosed within OABC under the velocity-time graph AB. Thus, the distance s travelled by the object is given by
s = area OABC (which is a trapezium)
= area of the rectangle OADC + area of the triangle ABDM.
= OA × OC + 1/2 (AD × BD)
Substituting OA = u, OC = AD = t and BD = at, we get
s = u × t + 1/2 (t×at)
or
s = u t + 1/2 a t2
- Equation For Position - Velocity Relation:
From the velocity-time graph, the distance s travelled by the object in time t, moving under uniform acceleration a is given by the area enclosed within the trapezium OABC under the graph. That is,
s = area of the trapezium OABC = (OA + BC) X OC/2
Substituting OA = u, BC = v and OC = t,
We get
s= (u+v) t/2
From the velocity-time relation
We get
t= v - u/a
We have
s = (v + u) x (v – u)/2a
or 2as = v2 – u2
Posted by Hakeem Urva Tul Wusqa 5 years, 1 month ago
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Posted by K Kaviya 5 years, 1 month ago
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Yogita Ingle 5 years, 1 month ago
- Let the mass of earth = M.
- Let the mass of the object = m.
- Distance between the the earth's centre and object = Radius of the earth = R.
- Therefore,
- Gravitational Force = F = GMm/ R 2
Posted by K Kaviya 5 years, 1 month ago
- 3 answers
Kavanpreet Kaur 5 years, 1 month ago
Yogita Ingle 5 years, 1 month ago
- Let the mass of earth = M.
- Let the mass of the object = m.
- Distance between the the earth's centre and object = Radius of the earth = R.
- Therefore,
- Gravitational Force = F = GMm/ R 2
Posted by Anshul Kumari 5 years, 1 month ago
- 1 answers
Yogita Ingle 5 years, 1 month ago
Inverse Square Law says that the strength of light (intensity) is proportional inversely to the square of the distance.
Inverse Square Law Formula is articulated as
I ∝ 1/d2
Where the distance is d, the intensity of the radiation is I.
Posted by K Kaviya 5 years, 1 month ago
- 1 answers
Meghna Thapar 5 years, 1 month ago
According to the universal law of gravitation, every object in the universe attracts every other object with a force which is proportional to the product of their masses and inversely proportional to the square of the distance between them. The direction of force is along the line joining the centres of the two bodies.
This law was given by Sir Isaac Newton.
Suppose two bodies A and B of masses M and m are lying at a distance d from each other. Let the force of attraction between these two bodies be F. according to the universal law of gravitation;
- The force between the two bodies is directly proportional to the product of their masses.
F ∝ M × m
- The force between the two bodies is inversely proportional to the square of the distance between them.
F ∝ 1/d2
Combining both the equations:
F ∝ M x m/d2
Or F = G M x m/d2 i.
where G is the constant of proportionality and is called the universal gravitation constant.
By multiplying crosswise we get
F × d2 = G M × m
Or G = F d2/ M x m
The SI unit of G can be obtained by substituting the units of force, distance and mass as N m2 kg –2.
The value of G was found out by Henry Cavendish (1731 – 1810). The accepted value of G is 6.673 × 10–11 N m2 kg–2.
Posted by Dhruv Khandelwal 5 years, 1 month ago
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Posted by Prince Maurya 5 years, 1 month ago
- 2 answers
Yogita Ingle 5 years, 1 month ago
Photosynthesis is a process used by plants and other organisms to convert light energy, normally from the sun, into chemical energy, that can be later released to fuel the organisms' activities. It mainly takes place in two steps, light reaction, and dark reaction. Light reaction is mainly used to produce ATP and NADPH2 which is used during carbon dioxide fixation during the dark reaction.
Posted by Prince Maurya 5 years, 1 month ago
- 3 answers
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Madhusmita Sahu 5 years, 1 month ago
1Thank You