General Knowledge

Introduction to Motion When we talk about motion or rest it is with reference to some point known as the origin.  So, now with respect to the change in the position we have two quantities which can be used to describe that change in position.  They are distance and displacement. So now the question is, what is the difference between the two? Talking about distance, it is defined as the total path length covered during the motion. It can be represented only by magnitude. On the other hand, displacement is the shortest distance between the initial and final position. It requires both magnitude and direction for complete representation. What is Motion? We can define motion as the change of position of an object with respect to time.  A book falling off a table, water flowing from the tap, rattling windows, etc all exhibit motion. Even the air that we breathe exhibits motion!  Everything in the universe moves. We live in a universe that is in continual motion.   Motion is mainly described

What is Force? pushing and pulling of any object resulting change the direction & shape is force.  Without force, nothing can be moved, stopped or change the direction. It is a quantitative interaction between two physical bodies, between an object and its environment. There are various types of forces in nature. If an object is in its motion state than its current state will be either static or motion. Its position will only be changed if it is pushed or pulled. The external push or pull applied on the object changes its current state of motion is known as Force. This force can be of different types. They are stated below. Different Types Of Forces Force is a physical cause that can change the state of motion of any object or the dimensions. Different types of Forces are listed below- Contact Forces The contact forces are the forces which occurs when we apply some effort on an object.  Following is the classification of contact force: ** Spring Force ** Applied Force ** Air Resist

The substances that we see around us are not in their pure form. They are basically a mixture of two or more substances. Methods Of Separating Mixtures Some of the common methods of separating substances or mixtures are: 1.   Handpicking 2.  Threshing 3.   Winnowing 4.   Sieving 5.   Evaporation 6.   Distillation 7.   Filtration or Sedimentation 8.   Separating Funnel 9.   Magnetic Separation Now Let us discuss these methods in detail below. 1.. Handpicking Handpicking process This method involves simply picking out all the unwanted substances by hand and separating them from useful ones. The separated substances may be an impurity that has to throw away or maybe that both the separated substances are useful.  For example – if you separate black grapes from green ones from a mixture of the two. 2..Threshing Threshing process This method is mostly done during the harvesting of crops. Normally, the stalks of the wheat are dried once it is harvested. The grain is then separated from the s