From Reading Table

Folding paper more than seven times

Most of us have heard the myth that you can’t fold a paper sheet more than seven times, doesn’t matter how big the paper sheet is. But this Mythbusters team has folded a football field size paper eleven times. Watch the video.… Read the rest

How much sugar is added to a can?

Excessive sugar is never a good thing. Perhaps you can’t imagine how much sugar is added to a can of soda or fruit drinks. It’s seven to eight tea spoon of sugar. Do you normally take this amount of sugar at home? Marshal Brain explaining this with an experiment which you can do at home.… Read the rest

Death-proof safety elevator

Today’s safety elevators don’t fall when cable breaks. A lock invented by American industrialist Elisha Otis locks the elevator while descending at high speed and hence prevents falling. This death defying elevator was introduced in 1852. Watch this discovery channel video to see how it was invented.… Read the rest

Solar & lunar eclipse explained

What is the difference between solar and lunar eclipse? Did you know a lunar eclipse on earth is like a solar eclipse on moon? Why lunar eclipse is so common compared to solar eclipse? You can watch lunar eclipse with naked eye, but not solar eclipse. Watch the video, physics girl explains all.… Read the rest

Carbon dioxide is heavier than air

Yes we all know that carbon dioxide is heavier than air, but how can we prove it? It can be proved with common chemicals found in kitchen. Reaction between baking soda (sodium bicarbonate) and vinegar produces carbon dioxide which can extinguish fire. Watch the simple experiment video and of course try at home!… Read the rest

Behavior of water in space

Canadian astronaut Chris Hadfield shows how water behaves in weightless environment of space station. He tries to wring out water from a wet wash cloth but because of surface tension water sticks with his hand like jelly and he uses another dry wash cloth to remove water from his hand.… Read the rest

Digital circuit and logic gate

Digital Circuit Those electronic circuits which work on digital data or signal are called digital circuits. Inputs and outputs of these circuits have only two possible states; that is high or low (voltage or current). These high and low states represent 1’s and 0’s which are binary digits, from where the name digital came from.… Read the rest

Truth table

Truth table is a mathematical table used to describe all possible logic states or logic levels of logic circuit inputs and corresponding output. It may be single input logic circuit, two inputs, three inputs and even more. This is a truth table for NOT operation. It has only one input and only two input states… Read the rest

Boolean algebra

Boolean algebra is named after English mathematician George Boole who introduced this different type of algebra in his first book The Mathematical Analysis of Logic. It was the driving force in development of digital electronics. All modern programming languages use this algebra. It has application in other branches of mathematics also. In ordinary algebra variables… Read the rest

Digital Electronics

Electronics changed the world and digital electronics has changed electronics. This digital electronics is different from analogue electronics. Before starting discussion on digital electronics I think it’s better to have some discussion on analogue and digital concept. Time is changing continuously and your analogue watch dial changes continuously. Your car speedometer with needle, mercury thermometer,… Read the rest