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physical theory
Science; General science
A physical theory usually involves the attempt to explain a certain class of physical phenomena by deducing them as necessary consequences of other phenomena regarded as more ...
Laser Interferometer Gravitational-wave Observatory (LIGO)
Science; General science
A physics research facility developed to detect cosmic gravitational waves and to measure these waves for scientific research. It consists of two installations within the ...
freshwater ecosystem
Science; General science
A physiologically interactive system within which growth, adaptation, species composition, nutrient cycling, biological productivity, and energy flows among inland aquatic ...
feynman diagram
Science; General science
A pictorial representation of elementary particles and their interactions. The diagrams show the paths of particles in space and time as lines, and the interactions between the ...
signal generator
Science; General science
A piece of electronic test equipment that delivers a sinusoidal output of accurately calibrated frequency. The frequency may be anywhere from audio to microwave, depending upon ...
wedge
Science; General science
A piece of rigid material whose two major surfaces make an acute angle θ. It is closely related to the inclined plane and is used to multiply the applied force and to change the ...
phytochrome
Science; General science
A pigment that controls most photomorphogenic responses in higher plants. As a result of the dependence of plants on the energy of sunlight and their sessile habit, mechanisms ...
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