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Home > Category Index for Science Quotations > Category Index D > Category: Displacement

Displacement Quotes (5 quotes)

Archimedes said Eureka,
Cos in English he weren't too aversed in,
when he discovered that the volume of a body in the bath,
is equal to the stuff it is immersed in,
That is the law of displacement,
Thats why ships don't sink,
Its a shame he weren't around in 1912,
The Titanic would have made him think.
From lyrics of song Sod’s Law.
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The forces which displace continents are the same as those which produce great fold-mountain ranges. Continental drift, faults and compressions, earthquakes, volcanicity, transgression cycles and polar wandering are undoubtedly connected causally on a grand scale. Their common intensification in certain periods of the earth’s history shows this to be true. However, what is cause and what effect, only the future will unveil.
In The Origins of Continents and Oceans (4th ed. 1929), trans. John Biram (1966), 179.
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This maze of symbols, electric and magnetic potential, vector potential, electric force, current, displacement, magnetic force, and induction, have been practically reduced to two, electric and magnetic force.
Describing Heaviside’s refinement of the original Maxwell Equations. In Joseph Larmore (ed.), The Scientific Writings of the Late George Francis Fitzgerald (1902) 294.
Science quotes on:  |  Current (54)  |  Electric (15)  |  Force (249)  |  Induction (60)  |  Magnetic (11)  |  Maze (10)  |  Potential (39)  |  Practical (133)  |  Reduce (53)  |  Symbol (73)  |  Vector (4)

What, then, is light according to the electromagnetic theory? It consists of alternate and opposite rapidly recurring transverse magnetic disturbances, accompanied with electric displacements, the direction of the electric displacement being at the right angles to the magnetic disturbance, and both at right angles to the direction of the ray.
'A Dynamical Theory of the Electromagnetic Field' (1864). In W. D. Niven (ed.), The Scientific Letters and Papers of James Clerk Maxwell(1890), Vol. 2, 1862-1973, 195.
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[After the flash of the atomic bomb test explosion] Fermi got up and dropped small pieces of paper … a simple experiment to measure the energy liberated by the explosion … [W]hen the front of the shock wave arrived (some seconds after the flash) the pieces of paper were displaced a few centimeters in the direction of propagation of the shock wave. From the distance of the source and from the displacement of the air due to the shock wave, he could calculate the energy of the explosion. This Fermi had done in advance having prepared himself a table of numbers, so that he could tell immediately the energy liberated from this crude but simple measurement. … It is also typical that his answer closely approximated that of the elaborate official measurements. The latter, however, were available only after several days’ study of the records, whereas Fermi had his within seconds.
In Enrico Fermi: Physicist (1970), 147-148.
Science quotes on:  |  Approximation (22)  |  Atomic Bomb (107)  |  Dropping (3)  |  Energy (214)  |  Experiment (602)  |  Explosion (27)  |  Enrico Fermi (19)  |  Flash (34)  |  Measurement (161)  |  Paper (83)  |  Second (59)  |  Shock Wave (2)  |  Trinity (7)


Carl Sagan Thumbnail In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) -- Carl Sagan
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