i) Through air :- Common cod, Tuberculosis, Pneumonia etc. ii) Through water :- Cholera, Amoebic dysentry etc. iii) Through vectors :- Mosquitoes :- Malaria, Dengue, Yellow fever etc. Flies :- Typhoid, Tuberculosis, Diarrhoea, Dysentry etc.
Where can I get best notes for class 9?
INNOVATIVE GYAN provides the best All Subject Class 9 Notes in Hindi And English free for students to refer and score well in the class 9 CBSE Board exams.
What is force notes 9th?
→ Force: It is the force that enables us to do any work. To do anything, either we pull or push the object. Therefore, pull or push is called force. Example, to open a door, either we push or pull it. A drawer is pulled to open and pushed to close.
How do we fall ill notes?
Immediate cause: The organisms that enter our body and causes disease is called immediate cause. For example, virus, bacteria, protozoa etc. surroundings, contaminated food, improper nourishment, poverty, poor standard of living etc. Diseases may be due to infectious and non-infectious causes.
Is Class 9 English easy?
Class 9th English is not so difficult if understood thoroughly.
How do you self study for class 9?
- Except for Mathematics, study all other subjects for 1-1.5 hours each on a daily basis.
- Mathematics requires a lot of practice, so allocate 2-2.5 hours for Maths.
- Allocate 1.5 hours for Science.
- Similarly, allocate 1.5 hours for Social Science papers (History, Geography, Civics, etc).
What is SI unit of force?
The SI unit of force is the newton, symbol N. The base units relevant to force are: The metre, unit of length — symbol m. The kilogram, unit of mass — symbol kg.
What is inertia SI unit?
Moment of inertia is defined as the tendency of an object to remain in a state of rest or of a constant rotational velocity. Greater the moment of inertia, more torque is required to change this state. Torque in rotational motion plays the same role as force in linear motion. Its SI unit is kg. metre2.
What is rest inertia?
Inertia of rest (static inertia) is the fundamental property possessed by a body to oppose any change in its state of rest. Or in other words, the body does not want to change its state of rest, but wants to continue its state of rest is called inertia of rest (static inertia).
What does disease look like?
Note: Disease can be viewed by examining symptoms of disease. The common symptoms of diseases include headache, fever, vomiting etc. Like jaundice can be examined by pale skin. Diarrhoea can be examined by loose motions.
What are the causes of disease?
- Bacteria. These one-cell organisms are responsible for illnesses such as strep throat, urinary tract infections and tuberculosis.
- Viruses. Even smaller than bacteria, viruses cause a multitude of diseases ranging from the common cold to AIDS.
What is a true solution?
A true solution is a homogeneous mixture of two or more substances in which the particle size of the material dissolved (solute) in the solvent is less than 10-9 m or 1 nm. True solution is exemplified by a simple sugar solution in water.
What is a mixture Class 9?
If two or more substances (elements or compounds) are mixed together in any proportion, and they do not undergo any chemical change but retain their properties, the resulting substance is called mixture.
What are elements Class 9?
Element is a pure substance made up of only one kind of atom which can’t be split up into two or more substance. compound is a pure substance made up of two or more substance combined in fixed proportion by mass.
How can I write a story in class 9?
Basically, developing and writing a good story needs the art of narration. You have to narrate the incidents in a sequential order leading to the final conclusion. Students should follow the basic theme as expounded by the input or by the introductory lines. They are not supposed to invent new and different themes.
How do I write a letter of Class 9?
POINTS TO REMEMBER : Use proper layout according to the type of the letter. Write the address, date, salutation and subscription near the left hand side margin. Indenting and punctuation mark may be avoided. Leave space after a Para or important part of layout.
How do you write a class 9 diary entry?
- A diary entry is personalized so write in first person.
- At times you may leave out the pronoun ‘I’.
- Refer to personal memories and give details.
- Use conversational and friendly language.
- Refer to parents, friends, etc. as how you would address them in person.
How can I get 1 rank in class 9?
- Study smaller portions at one go as it will help you retain in your mind for a long time.
- Don’t study more than 2 hours at a stretch.
- Take regular breaks to put your mind at rest.
- Focus more on core material that will help you obtain maximum marks.
- Learn and write.
Is 10th easier than 9th?
Yes, as a teacher I can close my eyes and say that Class 10 is much easier than Class 9. The same applies to Class 11 & Class 12 in which Class 12 will be much easier than Class 11. Generally, the difficulty level of Class 9 and Class 11 will be much higher than Class 10 and Class 12 respectively.
What percentage is good in class 9?
per cent is good in class 9•9th class marks do not matter in anything So don’t take too much tension. According to me 9th is a tough class so 82 per cent are very according to that your score is very good.
What is CGS full form?
The full form of CGS system is Centimeter Gram Second system. In the CGS system, fundamental units are Centimeter, Gram, and second. The full form of FPS system is Foot Pound Second system.
What is meant by 1 newton?
It is defined as that force necessary to provide a mass of one kilogram with an acceleration of one metre per second per second. One newton is equal to a force of 100,000 dynes in the centimetre-gram-second (CGS) system, or a force of about 0.2248 pound in the foot-pound-second (English, or customary) system.
What is the unit of speed?
The SI unit of speed is given in terms of basic units of distance and time. Thus, the SI unit of speed is metre per second or m/s.
What is the unit of momentum?
Therefore, the unit for momentum can be Newton-second (Ns). In the CGS system, if the mass is in grams and the velocity in centimeters per second, then the unit of momentum will be gram-centimeters per second (g⋅cm/s).
What is the symbol of inertia?
The Moment of Inertia is often given the symbol I. It is the rotational analogue of mass. In Newtonian physics the acceleration of a body is inversely proportional to mass. In Newtonian rotational physics angular acceleration is inversely proportional to the moment of inertia of a body.