Batteries are a device made up of electromagnetic cells capable of providing power to electrical equipment. Batteries...
Technology
Microwave ovens were invented by accident by an engineer named Percy Spencer when a chocolate bar in...
Thermometer is a tool that can be used to measure the temperature of a living and non...
Drones, also known as unmanned aerial vehicles (UAVs) are a type of aircraft that does not carry...
X-rays are a type of high-energy electromagnetic radiation, also called X-rays. X-rays are useful for a variety...
A microscope is a tool that can be used to make very small (microscopic) objects visible to...
Satellites are manmade objects placed into orbit, also referred to as artificial satellites. Natural satellites are not...
Originally conceived as an MP3 music player, the iPod has gradually become an all-purpose multimedia player, capable...
Modern cell phones are capable of much more than just sending and receiving phone calls. Mobile phones...
It used to be called the south pointing fish. During midsummer, the radical leaves of the compass...
The Diamond Sutra, a Buddhist scripture, was the first dated example of block printing. Bi Sheng in...
About 1 million people a year worldwide are implanted with a pacemaker. An estimated 1.5 million Americans...
