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Ask QuestionPosted by David Tiprasa 4 years, 3 months ago
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Posted by Anoop Ajith 4 years, 3 months ago
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Posted by Sangeeta Dedha 4 years, 3 months ago
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Yogita Ingle 4 years, 3 months ago
Arthropoda
This is the largest group of animals
The bodies of the organisms belonging to this group are bilaterally symmetrical and segmented.
These organisms have an open circulatory system. Therefore the blood does not flow in a well-defined blood vessel.
The coelomic cavity of these organisms is blood-filled.
These organisms have jointed legs.
Examples of organisms belonging to this group are prawns, butterflies,
houseflies, spiders, scorpions and crabs.
Posted by Kanav Dumra 4 years, 3 months ago
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Meghna Thapar 4 years, 3 months ago
The sense of smell is not considered a form of matter. However, the smell or odor of a substance is classified as matter. The smell of any substance (say, perfume) is the gaseous form of that substance which our olfactory system can detect (even at very low concentrations). Gas particles move very quickly (air particles move at 500 m/s on average at room temperature). However, a smell does not travel this fast. This is because its particles collide with each other and with particles of air very frequently.
Posted by Hasmitha Adas 4 years, 3 months ago
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Yash Dhyani 4 years, 3 months ago
Kanav Dumra 4 years, 3 months ago
Yogita Ingle 4 years, 3 months ago
Pesticides are chemical substances that are meant to kill pests. In general, a pesticide is a chemical or a biological agent such as a virus, bacterium, antimicrobial, or disinfectant that deters, incapacitates, kills, pests.
Posted by Chitralekha Khaund 4 years, 3 months ago
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Yogita Ingle 4 years, 3 months ago
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Mitosis |
Meiosis |
| Each chromosome replicates. The result is two genetically identical sister chromatids | Chromosomes not yet visible but DNA has been duplicated or replicated |
| Prophase I – crossing-over recombination – Homologous chromosomes (each consists of two sister chromatids) appear together as pairs. Tetrad is the structure that is formed. Segments of chromosomes are exchanged between non-sister chromatids at crossover points known as chiasmata (crossing-over) | Prophase –Each of the duplicated chromosomes appears as two identical or equal sister chromatids, The mitotic spindle begins to form. Chromosomes condense and thicken |
| Metaphase I Chromosomes adjust on the metaphase plate. Chromosomes are still intact and arranged as pairs of homologues | Metaphase -The chromosomes assemble at the equator at the metaphase plate |
| Anaphase I Sister chromatids stay intact. However, homologous chromosomes drift to the opposite or reverse poles | Anaphase – The spindle fibres begin to contract. This starts to pull the sister chromatids apart. At the end of anaphase, a complete set of daughter chromosomes is found each pole |
| Asexual Reproduction | Sexual Reproduction |
Posted by Jassi Singh 4 years, 3 months ago
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Yogita Ingle 4 years, 3 months ago
Bromine is a liquid and hence it possesses stronger intermolecular forces of attractions.
Posted by . . 4 years, 3 months ago
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Yogita Ingle 4 years, 3 months ago
The average speed of a body in a certain time interval is the distance covered by the body in that time interval divided by time. So if a particle covers a certain distance s in a time t1 to t2, then the average speed of the body is:
vav = s/(t2–t1)
In general, average speed formula is:
Average Speed = Total Distance/Total Time
Posted by Atul Rastogi 4 years, 3 months ago
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Posted by Khushi Pawar 4 years, 3 months ago
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Kanav Dumra 4 years, 3 months ago
Meghna Thapar 4 years, 3 months ago
The force of friction acts in a direction opposite to the direction in which an object moves. Place a book on the table and gently push it towards right side. It moves through some distance to the right side and then stops on its own. This means that the force of friction is acting on it in the opposite direction (towards left) which is opposing its motion. Similarly, if we push the book towards left side, it will move towards left side but the force of friction acts towards right side which makes it to stop.
Posted by Devesh More 4 years, 3 months ago
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Meghna Thapar 4 years, 3 months ago
A saturated solution is a solution which can dissolve no more solute. Solute is the thing that you are dissolving (example: table salt) and solvent is the thing you are dissolving the solute on (example: water). However, an unsaturated solution is a chemical solution in which the solute concentration is lower than its equilibrium solubility. In an unsaturated solution, the rate of dissolution is much greater than the rate of crystallization.
Posted by Ratna Swetha Kancharla 4 years, 3 months ago
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Vikash Singh 4 years, 3 months ago
Yogita Ingle 4 years, 3 months ago
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l. No. |
Differentiating Property |
Velocity |
Speed |
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Definition |
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2 |
Type of quantity |
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3 |
Magnitude |
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4 |
Change of direction |
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5 |
Interrelation |
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6 |
Unit (SI) |
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Posted by Anupama Singh 4 years, 3 months ago
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Posted by Ratna Swetha Kancharla 4 years, 3 months ago
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Yogita Ingle 4 years, 3 months ago
- Velocity: Velocity is the speed of an object moving in a definite direction.
- The SI unit of velocity is also metre per second.
- Velocity is a vector quantity; it has both magnitude and direction.
Posted by Tripti Mishra 4 years, 3 months ago
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Yogita Ingle 4 years, 3 months ago
An earthquake is the shaking of the surface of Earth due to the sudden release of energy in the Earth’s crust, as a result, seismic waves (also known as S waves)are created. The seismic activities in an area determine the type and intensity of the earthquake.
Posted by Sayanm Diwakar 4 years, 3 months ago
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Meghna Thapar 4 years, 3 months ago
Distance-Time graph when the object is stationery: The distance-time graph for an object which stops moving is a straight line parallel to the time axis. When an object becomes stationery its speed is zero.
Posted by Nilesh Kankhediya 4 years, 3 months ago
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Posted by Riddhesh Kirulkar 4 years, 3 months ago
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Gaurav Seth 4 years, 3 months ago
A colloid is a heterogeneous mixture whose particles are not as small as solution but they are so small that cannot be seen by naked eye. When a beam of light is passed through a colloid then the path of the light becomes visible. For example milk, smoke etc.
Yogita Ingle 4 years, 3 months ago
Colloids
- A colloid is a kind of solution in which the size of solute particles is intermediate between those in true solutions and those in suspensions.
- For Example: - Soap solution, Milk, Ink, Blood and solutions of synthetic detergents.
Posted by Saurav Sharma 4 years, 3 months ago
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Yogita Ingle 4 years, 3 months ago
- A supersaturated solution comprises of a large amount of solute at a temperature wherein it will be reduced as a result the extra solute will crystallize quickly.
- An unsaturated solution is a solution in which a solvent is capable of dissolving any more solute at a given temperature.
- A saturated solution can be defined as a solution in which a solvent is not capable of dissolving any more solute at a given temperature.
- Aqueous solution – When a solute is dissolved in water the solution is called an aqueous solution. Eg, salt in water, sugar in water and copper sulfate in water.
- Non-aqueous solution – When a solute is dissolved in a solvent other than water, it is called a non-aqueous solution. Eg, iodine in carbon tetrachloride, sulfur in carbon disulfide, phosphorus in ethyl alcohol.
- A dilute solution contains a small amount of solute in a large amount of solvent.
- A concentrated solution contains a large amount of solute dissolved in a small amount of solvent.
Posted by Parneet Jathol 4 years, 3 months ago
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Gaurav Seth 4 years, 3 months ago
If the body is in motion and stops due to deceleration, the final velocity is zero although the initial velocity is much higher than zero.
When brakes are suddenly applied to a moving car the final velocity becomes zero although the initial velocity is much higher than zero
Posted by Varsha Gemnani 4 years, 3 months ago
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Gaurav Seth 4 years, 3 months ago
DISADVANTAGES
1.Most of the fishes breed only during monsoon.
2. If all of them lay eggs at the same time, there will be a big problem to distinguish between those eggs.
3. There is a lack of good quality fish seeds available.
To overcome these problems, various ways have been worked out to breed these fish in ponds using hormonal stipulation.
Posted by Likitha R 4 years, 3 months ago
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Posted by Syed Abdullah 4 years, 3 months ago
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Master Knowledge Source 4 years, 3 months ago
Kanav Dumra 4 years, 3 months ago
Yogita Ingle 4 years, 3 months ago
(1) Miscible Liquid can be easily dissolved in any other liquids, but Immiscible Liquid do not dissolve in other.
Eg. Water, Ethanol etc. are miscible liquids, while Oil in water is immiscible.
(2) If the liquid is immiscible, you will be able to see a meniscus on the liquid, while for miscible liquids you will not.
Posted by Sandesh Reddy 4 years, 3 months ago
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Shabd Kumar 4 years, 3 months ago
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Kanav Dumra 4 years, 3 months ago
Jijivisha Varshney 4 years, 3 months ago
Posted by Gopika P Menon 4 years, 3 months ago
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Kanav Dumra 4 years, 3 months ago
Posted by Md Sahid 4 years, 3 months ago
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Yogita Ingle 4 years, 3 months ago
given: s= 10m
g= 10m/s2
u will be take 0 because initailly the body will on rest
s= ut+1/2 at2 a= g because of vertical
10= 0(t)+1/2(10) × t2
10= 5t2
2=t2
t= √2
t= 1.41
v= u+at
v= 0+gt
v= 10 × 1.41
v=14.1
v = 14m/s app
Gaurav Seth 4 years, 3 months ago
S=10m
g=10m/s
u=0m/s [ Body Starts From Rest ]
v = ?
v^2 - u^2 = 2gs
v^2 - 0^2 = 2 x 10 x 10
v^2 = 200
v = Root Of 200 (√200)
v = 14.14 ( Approx. )
Speed = 14.14 m/s
v=u+gt
14.14=0+10 x t
14.14=10t
t=14.14/10
t= 1.414 seconds
Time = 1.414 seconds
Posted by Md Sahid 4 years, 3 months ago
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Yogita Ingle 4 years, 3 months ago
let initial velocity = u & accleration is a then
distance travelled in 4 sec = S6
using , s=ut + at2/2
S6 = 4u + a36/2
= 6u+18a
distance covered in 2 sec = S2 = 2u + 4a/2
=2u+2a = 200 (given)
u+a = 100 ........................1
now distance covered in 2 to 6 sec is given 220cm
S6-200 = 220
6u + 18a = 420
u+3a = 70 .................2
from 1& 2
a = -15 & u=115
velocity after 7 sec = V7
V7 = u + at
=115 - 15*7=10cm/sec
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Yogita Ingle 4 years, 3 months ago
Natural Resources – A Resource which exists in nature is called a Natural Resource. It is not produced by any human being; rather it is available in nature itself. Human beings and other animals depend upon these resources for their existence.
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