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Ask QuestionPosted by Utkarsh Sharma 4 years ago
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Posted by Palak Pandey 4 years ago
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Posted by Kevin Pandya 4 years ago
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Yogita Ingle 4 years ago
(i) Crop production management
(ii) Crop improvement
(iii)Crop protection management
Posted by Dhairya Chitransh 4 years ago
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Yogita Ingle 4 years ago
By Z = 3, we mean that the atomic number of the element is 3. Its electronic configuration is 2, 1. Hence, the valency of the element is 1 (since the outermost shell has only one electron). Therefore, the element with Z = 3 is lithium.
Posted by Charming Princess? 4 years ago
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Yogita Ingle 4 years ago
Mass of bullet, m1 = 20g (= 0.02 kg)
Mass of pistol, m2 = 2 kg
Initial velocity of the bullet (u1) and pistol (u2) = 0
Final velocity of the bullet, v1 = +150m s-1
Let v be the recoil velocity of the pistol.
The total momentum of the pistol and bullet is zero before the fire. (Since both are at rest)
Total momentum of the pistol and bullet after it is fired is
= (0.02 kg x 150 m s-1) + (2 kg x v m s-1)
= (3 + 2v) kg m s-1
Total momentum after the fire = Total momentum before the fire
3 + 2v = 0
→v = -1.5 m/s
Thus, the recoil velocity of the pistol is 1.5 m/s.
Posted by Charming Princess? 4 years ago
- 1 answers
Yogita Ingle 4 years ago
Law of conservation of momentum states that For two or more bodies in an isolated system acting upon each other, their total momentum remains constant unless an external force is applied. Therefore, momentum can neither be created nor destroyed.
Consider two colliding particles A and B whose masses are m1 and m2 with initial and final velocities as u1 and v1 of A and u2 and v2 of B. The time of contact between two particles is given as t.
A=m1(v1−u1) (change in momentum of particle A)
B=m2(v2−u2) (change in momentum of particle B)
FBA=−FAB (from third law of motion)
FBA=m2∗a2=m2(v2−u2)/ t FAB=m1∗a1=m1(v1−u1)/t m2(v2−u2)/t=−m1(v1−u1)/t
m1u1+m2u2=m1v1+m2v2
Therefore, above is the equation of law of conservation of momentum where m1u1+m2u2 is the representation of total momentum of particles A and B before the collision and m1v1+m2v2 is the representation of total momentum of particles A and B after the collision.
Posted by Rengavadivelammal .C 4 years ago
- 1 answers
Yogita Ingle 4 years ago
| Healthy |
Disease Free |
|
A state of complete physical, mental and social well being |
State of the absence of discomfort in any part of the body |
|
It depends upon the individual as well as on social and environmental factors |
It depends on the individual only |
| A healthy person will be disease-free |
A disease-free person may or may not be healthy |
| A healthy person is energetic and is able to perform as per the requirement |
The performance of a disease-free person depends upon the environment and personal attitude |
Posted by Divya Gupta 4 years ago
- 1 answers
Yogita Ingle 4 years ago
When people sprinkle water on hot and dry roof on a sunny day, that water evaporates by taking energy from the ground, roof and surroundings.
The evaporation of water causes a cooling effect because the large latent heat of vaporization of water helps to cool the hot surface.
Posted by Kartik Totre 4 years ago
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Abhishek Chaudhary 4 years ago
Posted by Rengavadivelammal .C 4 years ago
- 3 answers
Yuvika Gupta 4 years ago
Yogita Ingle 4 years ago
-
Acute diseases refer to the medical condition that occurs suddenly and lasts for a shorter period of time.
-
Chronic diseases develop slowly and last for a lifetime.
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Chronic diseases are sometimes fatal.
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Acute diseases when persist for a longer time can term fatal, otherwise can be treated by certain medications.
Posted by Rengavadivelammal .C 4 years ago
- 1 answers
Yogita Ingle 4 years ago
| Healthy |
Disease Free |
|
A state of complete physical, mental and social well being |
State of the absence of discomfort in any part of the body |
|
It depends upon the individual as well as on social and environmental factors |
It depends on the individual only |
| A healthy person will be disease-free |
A disease-free person may or may not be healthy |
| A healthy person is energetic and is able to perform as per the requirement |
The performance of a disease-free person depends upon the environment and personal attitude |
Posted by Faiz Ansari 4 years ago
- 2 answers
Yogita Ingle 4 years ago
- Lysosomes are sphere-shaped sacs filled with hydrolytic enzymes that have the capability to break down many types of biomolecules.
- Lysosomes act as waste disposing of structures by the removal and degradation of undesirable products, both from the outside of the cell and from the inside of the cell.
- In case of a rupture in the lysosome, the enzymes are released in the cytoplasm and end up digesting the contents of the cell, this results in cell death. Due to this, the lysosome is also known as suicide bags of cells.
Posted by Sumi Deep 4 years ago
- 2 answers
Yogita Ingle 4 years ago
1.Chromoplast (red, orange, purple)
2. CHLOROPLAST(shades of green)
Posted by K.Kaviya Ix A 9032 4 years ago
- 1 answers
Yogita Ingle 4 years ago
(1) 1st equation formula -v=u+at
(2) 2nd equation formula -s=ut+1/2at^2
(3)3rd equation formula -v^2=v^2+at
(4)momentum=mass × velocity
(5)force=mass ×acceleration
(6) acceleration =change in velocity /time take
(7)speed =distance /time
(8)velocity =displacement /time
Posted by Sumi Deep 4 years ago
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Posted by Mohulbas Kalaiselvi 4 years, 1 month ago
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Devdatt Kumar Ujjwal 4 years ago
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Diya Singla 4 years, 1 month ago
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Meghna Thapar 3 years, 11 months ago
The two conditions essential for being free of disease are: Personal and -domestic . hygiene. Clean environment and surroundings.
There are many conditions essential for good health (both physical and mental) which are:
- Well balanced diet.
- Healthy Habits.
- Exercise and Relaxation.
- Being disease-free.
- Social and economic well-being.
- Leading stress free life.
Posted by Muskan Singh 4 years, 1 month ago
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Mukul Kumar 😎 4 years, 1 month ago
Posted by Neha Taware 4 years, 1 month ago
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Yogita Ingle 4 years, 1 month ago
Momentum The quantity of motion possessed by a moving body is known as momentum of the body.
Momentum of an object of mass m moving with a velocity v is the product of it.
It is denoted by p
p = mv
Its SI unit is kg-ms-1.
As from Newton’s llnd law, rate of change of momentum is equal to force applied.
Abhishek Sharma Sharma 4 years, 1 month ago
Posted by Shahnawaz Alam 4 years, 1 month ago
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Mukul Kumar 😎 4 years, 1 month ago
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Kajal Sharma 4 years, 1 month ago
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Kajal Sharma 4 years, 1 month ago
Gaurav Seth 4 years, 1 month ago
The Changing of a solid directly into vapours on heating,and of vapours into solid on cooling is called as sublimation.
The solid substance which undergoes sublimation is called sublime.
The solid obtained by cooling the vapours of the solid called a sublimate.
For Ex:camphor,Iodine,Ammonium Chloride,Naphthalene etc.
Effect of Change of Pressure
The physical state of matter can be changed by increasing or decreasing the pressure.When a high pressure is applied to a gas,it gets compressed and when we lower its temperature,it gets liquified.Gases can be liquified by compression and cooling.
For Ex:Solid carbon dioxide is stored under high pressure.This is because on decreasing the pressure on solid carbon dioxide,it gets converted directly into carbon dioxide gas
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Riya Mangang 4 years ago
1Thank You