Category Archives: Science

Electronic and electric

Sometimes these two words are confusing for many of us. As we know electricity is flow of electrons, what is the distinction between the two; where a transistor or a diode also allows the flow of electrons? In simple words electronics is a branch of engineering where current through vacuum tube, gas tube or semiconductor… Read the rest

Phone charger as a power source of logic gate experiment

We know minimum 5V DC is required for logic gate ICs. I do use an old phone charger as the power supply for simple logic gate experiments. Usually phone charger output is 5V DC. I think you can also try it, if you want to do simple logic gate experiments at low cost. You can… Read the rest

Quantum theory

Suppose you are hitting a ball with a bat and then using Newtonian or classical mechanics you can tell how long the ball will stay on air, how far it will go and trajectory of the ball. Even you can calculate at which speed the ball will hit the ground. To answer all the questions… Read the rest

How seismic wave and cold war era technology helping nuclear disarmament around the globe

Energy released in January 2016 nuclear test by North Korea Now you can’t hide a nuclear explosion in your country. Scientists around the globe continuously monitor seismic wave and these wave patterns tells whether it’s an earth quake, nuclear explosion, blasts from mine field or simply a lorry rolling over a highway and even nuclear… Read the rest

When people’s teeth exploded like bomb

Yes, there is enough evidence that many people’s teeth exploded like bomb in their mouth. It was in 19^th century and it’s still a mystery; no one knows why it happened. The dental cosmos was the first major journal for American dentists, in this journal a Pennsylvania dentist WH Atkinson documented an outbreak of… Read the rest

Sea salt and Table salt

For thousands of years salt was a very important commodity. Producing salt from sea water wasn’t easy but salt was necessary for preserving foods. In fact salt enabled human civilization to preserve foods. It was a very expensive commodity and in sometimes roman armies were paid in salt. The word salary comes from the Latin… Read the rest

First moon landing

Watch the video of first moon landing on July 20, 1969. It was NASA’s Apollo 11 mission which started the beginning of a new era, in Neil Armstrong’s words it was “one small step for man, one giant step for mankind”.… Read the rest

Make a basic electric motor

Electric motor converts electrical energy into mechanical energy. To understand the working principle you can build a simple motor at home. For this experiment you will need thin insulated wire, battery, paper clip or safety pin, tape, scissors, crocodile clip and adhesive tape. First video is very simple; it shows how to build simple motor… Read the rest

Why do we put salt on icy road instead of heating?

Instead of heating we use salt to melt snow. Because snow will continue to fall on road and freeze again, but salt decrease freezing point and prevents forming of ice. Usually table salt sodium chloride is used but calcium chloride is twice effective than sodium chloride and used in countries like Russia. Do you know… Read the rest

Washing hair in space

Every astronauts floats like superheroes in the weightless environment of space station. Not only astronauts everything including water floats there, so without running water washing hair isn’t easy. In this video astronaut Karen Nyberg shows how she washes her hair with shampoo in space. It’s different and tricky.… Read the rest