Knowledge for All, without Barriers…
If your thoughts tend to wander toward the grammatical, you’ve probably noticed that sound and noise are often used interchangeably. There doesn’t appear to be an obvious delineation between
To understand heat, we have to get down to the molecular level. Heat is energy. It’s caused by the movement of atoms. The faster an object’s atoms move, the hotter it
Have you ever played laser tag? If so, you know there’s nothing like it. Darting through the fog, dodging lasers as you aim for members
Did you know temperature can even change the speed of sound? It’s true! Are you WONDERing how? Let’s start by talking about what sound is. Sound
When you left, you had a tall glass of iced tea and an ice cream bar. Upon your return, you have a tepid glass of watery tea and a
What exactly is a kaleidoscope? They look a little bit like small telescopes you can hold in your hands. One end has a hole you
Have you ever seen a picture of a baby inside his or her mother’s body? If so, you may have wondered how doctors get their
The laws of physics show that every piece of glass — actually, every material on Earth — has a natural resonant frequency. That frequency is the speed at which it will
Basically, anything with a smooth surface that reflects almost all of the light that hits it — with only very little light absorbed or scattered
The matter is all around you. The matter is anything that has mass or takes up space. If it’s made up of atoms or molecules,
Work = force × distance कार्य = बल × दूरी 2. Energy = force × distance ऊर्जा = बल × दूरी 3. Speed = distance
Quantity – Units (S.I.) ●Length – Metre ●Time – Second ●Mass – Kilogram ●Area – Square meter ●Volume – Cubic meter ●Velocity – Metre/second ●Acceleration
Optical illusions are images or pictures that we perceive differently than they really are. Put another way, optical illusions occur when our eyes send information to our brains that tricks
3D stands for three-dimensional. “Regular” movies are 2D, or two-dimensional. What are dimensions, and what’s the difference? Dimensions are properties of space. They refer to extension in a particular
Can you feel the pressure? It’s around you…all the time…everywhere you go. What is it? Atmospheric pressure — often referred to simply as air pressure — is the constant force exerted on you
Mass measures the number of atoms in an object, combined with the density of those atoms. Mass is how much “stuff” is in an object. Mass isn’t the same as size,
When air particles vibrate, they bump into other particles near them. Then these particles begin to vibrate and bump into even more air particles. When
On Earth, gravity is the constant force pulling us toward Earth and preventing us from flying off into space like a balloon. When you step on a scale, it shows your weight as
Everything in the world consists of tiny particles called “atoms.” Atoms contain even tinier particles called “protons,” “neutrons” and “electrons.” Most atoms are neutral, which
क्षेत्रफल area लंबाई × चौड़ाई आयतन volume लंबाई× चौड़ाई×ऊंचाई द्रव्यमान घनत्व density द्रव्यमान/आय आवृत्ति frequency 1/आवर्तकाल वेग velocity विस्थापन/समय चाल speed
What are Radio Telescope? Unlike optical telescopes, radio telescopes can detect invisible gas and, therefore, they can reveal areas of space that may be obscured
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