1. Steam Iron
The steam iron is such a machine that uses a lot of Physics to make it go. The foremost principle of Physics used in the steam iron is “Heat.” Heat, in Thermodynamics, is a type of energy transfer from a warmer substance to a colder one. Ironing works by having a heated metal base- the soleplate.
2. Washing Machine
The dryer of washing machine is a rapidly rotating container that applies centrifugal force to its contents. The centrifugal force acts in a direction away from the centre and hence can be used to throw the water molecules on the clothes radially outwards during the spin cycle of the washing machine.
3. Spinning
When the figure skater draws her arms and a leg inward, she reduces her moment of inertia thus rotating at a faster angular speed. This is due to conservation of angular momentum.
4. Falling Down
Suppose you are climbing a tree, and suddenly you slip and fall down from the tree. Then, you may break a bone or two. But if same thing happens to a little ant, that is, if it falls down from height, it does not get hurt. Why is it so?
From ant’s point of view, the atmosphere is thick and viscous and its experience of falling from a height is similar to ours when we fall through water to the bottom of the pool. The air underneath the falling ant becomes like a large cushion of safety.
5. Ball Point Pen
Whether you are at your workplace or in your school, a Ball Point Pen is your weapon. Had Physics not been there, you would not have able to write with a Ball Point Pen on a paper. In this case, the concept of gravity comes into play. As your pen moves across the paper, the ball turns and gravity forces the ink down onto the top of the ball where it is transferred onto the paper.
6. Camera Lens
The phenomenon of “Selfie” has engulfed people of every age group. You entertain yourself by clicking photos. The Lens used in a camera works on the principle of Optics. The set of convex lenses provide the camera with an image outside of the camera.
7. Cell Phones
Cellphones have become like Oxygen gas in modern social life. Hardly, anyone would have been untouched by the effects of a cell phone. Whether conveying an urgent message or doing incessant gossips, cellphones are everywhere. But do you know how does a cell phone works? It works on the principle of electricity and the electromagnetic spectrum, undulating patterns of electricity and magnetism.
8. Image Formation
Have you noticed that when standing inside a room at night, you can often see your reflection in a pane of glass? In similar way, because there is much less light coming from the bottom of a lake, the surface of the lake will act like a mirror.
But an image can also be formed by refraction. A fish seen in the water will usually appear to be at a different depth than it actually is, due to the refraction of light rays as they travel from the water into the air.
Lastly, there exist phenomena which appear due to combination of reflection and refraction. For example, a rainbow is seen when light passes through water droplets hanging in the atmosphere. The light bends, or refracts, as it enters the droplet, and then reflects off the inside of the raindrop.
9. Static Electricity
When two objects that are not good electrical conductors are rubbed together, electrons from one of the objects rub off onto the other. The more rubbing between two objects, the more static electricity build up and the larger the electrical charge.
10. Headphones/Earphones
When you get tired of work or studies, listening to music comes in handy. Have you ever thought about how do your headphones/earphones work? Well, it’s again because of Physics. The concept of magnetism and sound waves are involved in the science of your headphones/earphones. When you plug your headphones/earphones into an electrical source, the magnet in your headphones/earphones creates an electromagnetic field, which ultimately results in sound waves.
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