General science

General science

A variety of science subjects concerning the fundamental knowledge about different aspects of our world and their underlying principles.

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General science

The Global Positioning System (GPS) consists of a constellation of 24 or more satellites that transmit navigation signals in two frequency bands called L1 (centered at 1575.42 MHz) and L2 (centered ...

Tallgrass prairie

Science; General science

Tallgrass prairie is one of the most diverse and productive types of grassland in North America. Historically, tallgrass prairie stretched from Canada to Texas and from Kansas to Ohio. West of the ...

Refrigeration

Science; General science

The cooling of a space or substance below the environmental temperature. The art was known to the ancient Egyptians and people of India, who used evaporation to cool liquids in porous earthen jars ...

Angiosperms

Science; General science

The angiosperms, or flowering plants, are geologically a very young group. They first appeared in the fossil record in the earliest Cretaceous about 140 million years ago, almost 300 million years ...

Photoionization

Science; General science

The ejection on one or more electrons from an atom, molecule, or positive ion following the absorption of one or more photons. The process of electron ejection from matter following the absorption of ...

Electromyography

Science; General science

The detection and recording of electrical activity generated by muscle fibers. The basic elements of motor control in the body are the motor units which comprise motor neurons in the brainstem or ...

Physical chemistry

Science; General science

The branch of chemistry that deals with the interpretation of chemical phenomena and properties in terms of the underlying physical processes, and with the development of techniques for their ...