TN 11th result 2020 to be announced on July 31, 2020 at 9.30

Tamil Nadu 11th Result 2020  TN 11th  Result 2020 Declared at tnresults.nic.in

The Directorate of Government Exams (DGE) Tamil Nadu would be releasing TN 11th result 2020 on July 31, 2020.

Students can check the results through the websites- dge.tn.gov.in, tnresults.nic.in

After releasing the plus two result, the Directorate of Government Examinations (DGE) Tamil Nadu will announce the result of plus one examination on Friday, July 31. State Education Minister KA Sengottaiyan tweeted that the examination results will be released on July 31 at 9:30 am for students who have written Class 11 and those candidates who re-appeared for Class 12.

11-ஆம் வகுப்பு, 12-ஆம் வகுப்பு மறுதேர்வு எழுதிய மாணாக்கர்கள், தனித்தேர்வர்களுக்கு 31.7.2020 அன்று காலை 9.30 மணிக்கு தேர்வு முடிவுகள் வெளியிடப்படும். மாணாக்கர்கள், தனித்தேர்வர்கள் அவரவர் பயின்ற பள்ளிகளில் வழங்கியுள்ள கைப்பேசி எண்ணிற்கு SMS மூலம் தேர்வு முடிவுகள் அனுப்பப்படும்.

Define inertia. Give its classification

The inherent property of a body to resist any change in its state of  rest or  the state of uniform motion, unless it is influenced upon by an external unbalanced force, is known  as ‘inertia’.

Types of Inertia

Inertia of rest: The resistance of a body to change its state of rest is called inertia of rest.

Example

When you vigorously shake the branches of a tree, some of the leaves and fruits are detached and they fall down, (Inertia of rest).

Inertia of motion: The resistance of a body to change its state of motion is called  inertia of motion.

Example

An athlete runs some distance before jumping. Because, this will help him jump longer and higher. (Inertia of motion)

Inertia of direction: The resistance of a body to change its direction of motion is called  inertia  of direction.

Example

When you make a sharp turn while driving a car, you tend to lean sideways, (Inertia of direction).

Video:https:https://youtu.be/yAZxgwkfvmw

What is function?

A relation f between two non-empty sets A and B is called a function from A to B if, for each a ∈ A there exists only one b ∈B such that (a,b) ∈ f .That is, f ={(a,b)| for all a ∈ B, b∈B }. A function is also called as a mapping or transformation

• A function is also called as a mapping or transformation
• The set A is called the domain of the function f and the set B is called its co-domain.
• If f (a) = b, then b is called ‘image’ of a under f and a is called a ‘pre-image’ of b.
• The set of all images of the elements of A under f is called the ‘range’ of f.
• Every function is a relation. Thus, functions are subsets of relationsand relations are subsets of cartesian product
• The range of a function is a subset of its co-domain.

Example 

 Let X = {1,2, 3, 4} and Y = {2, 4,6, 8,10} and R = {(1,2),(2,4),(3,6),(4,8)}.

Show that R is a function and find its domain, co-domain and range?

Solution: From the diagram, we see that for each x∈ X , there exists only one y ∈Y . 

Thus all elements in X have only one image in Y. Therefore R is a function.

Domain X = {1,2,3,4}; Co-domain Y = {2,3,6,8,10}; Range of f = {2,4,6,8}.