Question Discussion & Solution

The correct answer is Lactometer.

• Some other important measuring instruments are:

Concept:

Newtons Third Law of Motion

• Every action has an equal and opposite reaction. Action and reaction forces act on different bodies. 

Explanation:

• Considering an example, A bullet is fired from a gun.
• The gun applies force to a bullet and the bullet applies force on the gun. 
• If we consider the gun as the only object, it gives recoil which is the reaction force applied by it on the bullet. 
• So action force is a force on bullet and reaction force is applied on the gun. 
• Both forces are not on the same object hence the action and reaction forces cannot balance each other. 

So, 'do not act on the same body.' is the correct option. 

Feminine means qualities or appearance of aFemale.

Similarly,

Masculine means qualities or appearance of a Male.

The study of individual organisms and their interaction with the environment is known as autecology.

Key Points 

• Ecology is the study of the interaction of organisms with their environment.
• Synecology and autecology is the branch of ecology.
• Synecology is the study of a group of organisms and their relation to the environment.
• Community ecology or synecology is the study of the interactions between species in communities on many spatial and temporal scales, including the distribution, structure, abundance, demography, and interactions between coexisting populations.
• For example, the study of the entire grassland ecosystem. 

Key Points

 An array is defined as the collection of similar types of data items stored at contiguous memory locations. Arrays are the derived data type in C programming language which can store the primitive type of data such as int, char, double, float, etc. C array is beneficial if you have to store similar elements.

int array[] = {2, 3, 4, 5}; This array storage be like, 

The above array at index I can be accessed by, a[i], i[a], *(a+i) or *(i+a) all the above representations all are equal and gives the i th index value.

printf(%d', 2[array]); So, it gives the 2^nd  index value. i.e 4.

Hence the correct answer is 4.

Additional InformationProgram: 

#include
int main()
{
    int arr[] = { 2, 3, 4, 5 };
    printf("%d ",arr[2]);
    printf("%d ",2[arr]);
    printf("%d ",*(2+arr));
    printf("%d ",*(arr+2));
    return 0;
}

Output: 4 4 4 4

So above given 2^nd index value is 4 for all above print statements.