On a hot sunny day, you return home covered in sweat only to see that there is no electricity and hence no Air Conditioner. What would it feel like? Electricity has become a modern necessity for humans because it is a controllable and convenient form of energy. Ever wondered how does electricity flow in an …
Electricity is a boon to mankind! We have studied the conduction of electricity in the previous chapter. The electric current-carrying wires behave like a magnet. There is a close connection between electricity and magnetism. This connection between electricity and magnetism is called the “Electromagnetism”. Several appliances work on this incredible phenomenon. Curious enough to learn …
All living beings can’t stay in one place for hours long. Even the laziest person will show slight changes in their position. This change of position indicates that we move from one place to another. This change of position and movement is called – ‘Motion’. Not only all living organisms exhibit motion, but non-living things …
In the last chapter, we learnt that every living and non-living thing on the Earth exhibits motion. In this chapter, we will learn more about what causes the motion. This question has boggled the physicists for many centuries. To move any object, you require ‘Force’. In the same way, to stop any moving object, you …
You may have heard of the great scientist – Archimedes. He invented the science of mechanics and hydrostatics, gave us one of the most fundamental concepts of physics – the centre of gravity. Isaac Newton discovered the concept of Gravity. It is with this concept that we can study why everything that is thrown upwards …
Science always deals with tricks and tips that leave our minds baffled. For example – the term ‘work’ in regular world means – “activity involving mental or physical effort done in order to achieve a purpose or result.” Simple, isn’t it? But what if we tell you that ‘work’ in scientific term means – “is …
Take this experiment. Early in the morning, at 6.00 am, go out to your balcony. Close your eyes and concentrate on the sounds that you will hear. Surely, you would be able to recognise the sounds of birds, dogs, rustling trees, and others. But have you ever given a thought of how are you able …
Throwing a ball, lifting a heavy object or stopping a moving thing, all of these activities require an application of force. And what do we mean by force? Force can be defined as actions that we perform on various objects in order to move them. Force is associated with the concept of pressure. How are …
Imagine you are taking a walk, and you see a banana peel lying on the road. You tend to skip that. And why is that so? Well, the answer lies in the SCIENCE of friction. It is a type of force that resists the movement of one surface on the other. It is Friction that …
Ever heard the annoying sound made by a mosquito near your ears? Ever wondered how these organisms are producing sound? Well, they are able to generate sound by vibrating their wings. That came out as surprise, didn’t it? Sound is a wave that is generated due to vibration, it may be the irritating sound of …
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