Psychology is defined as a scientific discipline which deals with the studies of mental processes, experiences and behaviour in different context.

Question: 

The vector sum of the forces of 10N and 6N can be
(a) 2N
(b) 8N
(c) 18N 
(d) 20N

Maximum resultant of vectors = 10 + 6 = 16 N
Minimum resultant of vectors = 10 - 6 = 4 N

Force should lie in between maximum and minimum resultant of vectors.

The force must lie between the range of maximum and minimum resultant of these vectors .

In option (a) , 2N ‹ 4N 
In option (b), 4N ‹8N ‹16N , it lies between the range So, this is correct answer. 
In option (c) 18N › 16N 
In option (d) 20N›16N 

Hence, option (b) is correct. 

Trigonal Planar Shape of Molecule:

• In this type of molecule, we find three molecules attached to a central atom.
• They are arranged in such a manner such that repulsion between the electrons can be minimized (toward the corners of an equilateral triangle).
• Example: BF₃

Culture combines many elements to create a unique way of living for different people. In this lesson, we identify four of the elements that exist in every culture, albeit in different forms: symbols, language, values, and norms.

#include <iostream>
using namespace std;
int main() {
int width, lngth, area, peri;
cout << "\n\n Find the Area and Perimeter of a Rectangle :\n";
cout << "-------------------------------------------------\n";
cout<<" Input the length of the rectangle : ";
cin>>lngth;
cout<<" Input the width of the rectangle : ";
cin>>width;
area=(lngth*width);
peri=2*(lngth+width);
cout<<" The area of the rectangle is : "<< area << endl;
cout<<" The perimeter of the rectangle is : "<< peri << endl;
cout << endl;
return 0; }

• Acoelomate - Flatworms (phyla Platyhelminthes, Nemertea, and Mesozoa) lack a coelom, although nemerteans have a fluid-filled cavity at their anterior, or head, end, which is used to eject the proboscis rapidly. The lack of a fluid-filled cavity adjacent to the muscles reduces the extent to which the muscles can contract and the force they exert. Other examples -<i> Spongilla</i>, sea anemone,<i> Planaria,</i> liver fluke, etc.
• Pseudocoelomate animals have a pseudocoelom (literally “false cavity”), which is a fully functional body cavity. Tissue derived from mesoderm only partly lines the fluid filled body cavity of these animals. Thus, although organs are held in place loosely, they are not as well organized as in a coelomate. Example - <i>Wuchereria, Ascaris.</i>
• Coelomate animals or Coelomata ( "true coelom") have a fluid filled body cavity called a coelom with a complete lining called peritoneum derived from mesoderm.  Example - <i>Nereis</i>, Earthworm, Scorpion, Birds, Fishes, Horse.

In the Modern world, one can adapt to more than one society. Among foreigners, he may exhibit himself as a society member of India. Within India, if he uses the word society it means that he is talking about his society which denotes either religion or caste or another type of tribal society. It is called as pluralities among the societies.

In society, we find many types of people. It comprises of rich as well as poor, educated as well as illiterates, normal as well as abnormal, Police as well as thieves etc. The benefits enjoyed by people of high status in society are not provided to the downtrodden people. This is called as Inequalities among the societies."

When a substance does not contain discrete molecules as their constituent units and have a three-dimensional structure, formula mass is used to calculate molecular mass which is sum of all the atomic masses of atom present in the formula.
For example, in sodium chloride (NaCl) , sodium as chloride ions are arranged in a three-dimensional structure i.e. there are two different entities and not a single entity (like in a molecule). Therefore, the formula mass of NaCl = Mass of Na +Mass of Cl = (23 +35.5)u = 58.5 u.