A balloon is a flexible bag that can be inflated with a gas, such as helium, hydrogen, nitrous oxide, oxygen, air. For special tasks, balloons can be filled with smoke, liquid water, granular media, or light sources. Modern day balloons are made from materials such as rubber, latex, polychloroprene, or a nylon fabric, and can come in many different colors.
In communications and information processing, code is system of rules to convert information—such as a letter, word, sound, image, or gesture—into another form, sometimes shortened or secret, for communication through a communication channel or storage in a storage medium.
The United States government has maintained a variety of vehicles for the President.
The Mikoyan-Gurevich MiG-15 is a jet fighter aircraft developed by Mikoyan-Gurevich for the Soviet Union. The MiG-15 was one of the first successful jet fighters to incorporate swept wings to achieve high transonic speeds.
Ink is a liquid or paste that contain pigments or dyes and is used to color a surface to produce an image, text, or design.Ink is used for drawing or writing with a pen, brush, or quill.Thicker inks, in paste form, are used extensively in letterpress and lithographic printing.
A battery converts chemical energy into electrical energy by a chemical reaction.
The tunnels of Củ Chi are an immense network of connecting tunnels located in the Củ Chi District of Ho Chi Minh City (Saigon), Vietnam, and are part of a much larger network of tunnels that underlie much of the country.
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