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A cement is a binder, a substance used for construction that sets, hardens, and adheres to other materials to bind them together.
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Dynamite is a very powerful explosive
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is a wheeled motor vehicle used for transportation.
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is the technique and art of creating and projecting footage
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Television is a system for the transmission and reception of images and sounds at a distance that simulate movement, using a diffusion mechanism.
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Radar is a system that uses electromagnetic waves to measure distances, altitudes, directions and speeds of objects
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A jet aircraft is an aircraftpropelled by jet engines.
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A nuclear reactor is a device where a controlled nuclear chain reaction takes place.
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Sputnik 1 was the first successful attempt to put an artificial satellite into orbit around the Earth.
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is a light source made of a semiconductor material with two terminals
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Electronic mail is a method of exchanging messages between people using electronic devices.
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is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area.
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A personal computer is a multi-purpose computer whose size, capabilities, and price make it feasible for individual use.
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is an industry specification for wireless personal area networks
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The DVD is a type of optical disc for data storage.
