Celebrating 18 Years on the Web
TODAY IN SCIENCE HISTORY ®
Find science on or your birthday

Today in Science History - Quickie Quiz
Who said: “Environmental extremists ... wouldn’t let you build a house unless it looked like a bird’s nest.”
more quiz questions >>
Home > Category Index for Science Quotations > Category Index C > Category: Collision

Collision Quotes (9 quotes)

For the evolution of science by societies the main requisite is the perfect freedom of communication between each member and anyone of the others who may act as a reagent.
The gaseous condition is exemplified in the soiree, where the members rush about confusedly, and the only communication is during a collision, which in some instances may be prolonged by button-holing.
The opposite condition, the crystalline, is shown in the lecture, where the members sit in rows, while science flows in an uninterrupted stream from a source which we take as the origin. This is radiation of science. Conduction takes place along the series of members seated round a dinner table, and fixed there for several hours, with flowers in the middle to prevent any cross currents.
The condition most favourable to life is an intermediate plastic or colloidal condition, where the order of business is (1) Greetings and confused talk; (2) A short communication from one who has something to say and to show; (3) Remarks on the communication addressed to the Chair, introducing matters irrelevant to the communication but interesting to the members; (4) This lets each member see who is interested in his special hobby, and who is likely to help him; and leads to (5) Confused conversation and examination of objects on the table.
I have not indicated how this programme is to be combined with eating.
Letter to William Grylls Adams (3 Dec 1873). In P. M. Harman (ed.), The Scientific Letters and Papers of James Clerk Maxwell (1995), Vol. 2, 1862-1873, 949-50.
Science quotes on:  |  Colloid (5)  |  Communication (58)  |  Conduction (3)  |  Confusion (34)  |  Crystal (47)  |  Dinner (9)  |  Eat (38)  |  Examination (60)  |  Freedom (76)  |  Gas (46)  |  Greeting (3)  |  Hobby (4)  |  Irrelevant (5)  |  Lecture (54)  |  Programme (4)  |  Radiation (22)  |  Remark (14)  |  Requisite (6)  |  Society (188)  |  Something To Say (4)  |  Talk (61)

I am pleased, however, to see the efforts of hypothetical speculation, because by the collisions of different hypotheses, truth may be elicited and science advanced in the end.
Letter (5 Sep 1822) to Mr. George F. Hopkins. Collected in The Writings of Thomas Jefferson: Correspondence (1854), Vol. 7, 260.
Science quotes on:  |  Advance (123)  |  Different (110)  |  Effort (94)  |  Hypothesis (227)  |  Hypothetical (3)  |  Science (1699)  |  Scientific Method (155)  |  Speculation (77)  |  Truth (750)

Not every collision,
not every punctilious trajectory
by which billiard-ball complexes
arrive at their calculable meeting places
lead to reaction. ...
Men (and women) are not
as different from molecules
as they think.
Hoffmann, as a chemist-turned-poet is making the analogy of random intermolecular interactions to those of humans. From poem, 'Men and Molecules', The Metamict State (1984), 43. Cited as an epigraph in William L. Masterton and Cecile N. Hurley Chemistry: Principles and Reactions, Updated Edition (2005), 282.
Science quotes on:  |  Arrive (17)  |  Ball (20)  |  Billiard (2)  |  Complex (78)  |  Difference (208)  |  Man (345)  |  Meeting (14)  |  Reaction (59)  |  Think (205)  |  Trajectory (4)  |  Woman (94)

Nymphs! you disjoin, unite, condense, expand,
And give new wonders to the Chemist’s hand;
On tepid clouds of rising steam aspire,
Or fix in sulphur all its solid fire;
With boundless spring elastic airs unfold,
Or fill the fine vacuities of gold
With sudden flash vitrescent sparks reveal,
By fierce collision from the flint and steel. …
Science quotes on:  |  Chemistry (239)  |  Flash (25)  |  Flint (6)  |  Gold (55)  |  Spark (18)  |  Steam (24)  |  Steel (14)  |  Sulphur (15)

Our atom of carbon enters the leaf, colliding with other innumerable (but here useless) molecules of nitrogen and oxygen. It adheres to a large and complicated molecule that activates it, and simultaneously receives the decisive message from the sky, in the flashing form of a packet of solar light; in an instant, like an insect caught by a spider, it is separated from its oxygen, combined with hydrogen and (one thinks) phosphous, and finally inserted in a chain, whether long or short does not matter, but it is the chain of life. All this happens swiftly, in silence, at the temperature and pressure of the atmosphere, and gratis: dear colleagues, when we learn to do likewise we will be sicut Deus [like God], and we will have also solved the problem of hunger in the world.
Levi Primo and Raymond Rosenthal (trans.), The Periodic Table (1975, 1984), 227-228. In this final section of his book, Levi imagines the life of a carbon atom. He calls this his first “literary dream”. It came to him at Auschwitz.
Science quotes on:  |  Activation (5)  |  Adherence (2)  |  Atmosphere (63)  |  Atom (251)  |  Carbon (48)  |  Catch (21)  |  Chain (38)  |  Combination (69)  |  Complicated (38)  |  Decisive (9)  |  Flash (25)  |  Form (210)  |  Gratis (2)  |  Happening (32)  |  Hunger (13)  |  Hydrogen (37)  |  Innumerable (17)  |  Insect (57)  |  Insertion (2)  |  Instant (10)  |  Large (82)  |  Leaf (43)  |  Learning (174)  |  Life (917)  |  Light (246)  |  Likewise (2)  |  Long (95)  |  Message (30)  |  Molecule (125)  |  Nitrogen (18)  |  Oxygen (49)  |  Packet (2)  |  Phosphorus (15)  |  Photon (10)  |  Photosynthesis (15)  |  Pressure (31)  |  Problem (362)  |  Receive (39)  |  Separation (32)  |  Short (31)  |  Simultaneity (3)  |  Sky (68)  |  Solar (6)  |  Solution (168)  |  Spider (8)  |  Sun (211)  |  Swiftness (3)  |  Temperature (42)  |  Uselessness (21)  |  World (667)

Over very long time scales, when the perturbing influences of both Jupiter and Saturn are taken into account, the seemingly regular orbits of asteroids that stray into the Kirkwood gaps turn chaotic. For millions of years … such an orbit seems predictable. Then the path grows increasingly eccentric until it begins to cross the orbit of Mars and then the Earth. Collisions or close encounters with those planets are inevitable.
In article 'Tales of Chaos: Tumbling Moons and Unstable Asteroids", New York Times (20 Jan 1987), C3.
Science quotes on:  |  Asteroid (11)  |  Chaos (63)  |  Cross (9)  |  Earth (487)  |  Eccentric (10)  |  Inevitable (17)  |  Influence (110)  |  Jupiter (17)  |  Mars (26)  |  Million (89)  |  Orbit (58)  |  Path (59)  |  Perturb (2)  |  Planet (199)  |  Predictable (9)  |  Regular (8)  |  Saturn (10)  |  Stray (4)

The experiments that we will do with the LHC [Large Hadron Collider] have been done billions of times by cosmic rays hitting the earth. ... They're being done continuously by cosmic rays hitting our astronomical bodies, like the moon, the sun, like Jupiter and so on and so forth. And the earth's still here, the sun's still here, the moon's still here. LHC collisions are not going to destroy the planet.
As quoted in Alan Boyle, 'Discovery of Doom? Collider Stirs Debate', article (8 Sep 2008) on a msnbc.com web page.
Science quotes on:  |  Billion (52)  |  Continuously (7)  |  Cosmic Ray (6)  |  Destruction (80)  |  Earth (487)  |  Experiment (543)  |  Jupiter (17)  |  Large Hadron Collider (6)  |  Moon (132)  |  Plant (173)  |  Sun (211)

Tis evident that all reasonings concerning matter of fact are founded on the relation of cause and effect, and that we can never infer the existence of one object from another, unless they be connected together, either mediately or immediately... Here is a billiard ball lying on the table, and another ball moving toward it with rapidity. They strike; and the ball which was formerly at rest now acquires a motion. This is as perfect an instance of the relation of cause and effect as any which we know, either by sensation or reflection.
An Abstract of A Treatise on Human Nature (1740), ed. John Maynard Keynes and Piero Sraffa (1938), 11.
Science quotes on:  |  Cause (231)  |  Effect (133)  |  Existence (254)  |  Motion (127)  |  Reason (330)  |  Reflection (50)  |  Sensation (22)

To pick a hole–say in the 2nd law of Ωcs, that if two things are in contact the hotter cannot take heat from the colder without external agency.
Now let A & B be two vessels divided by a diaphragm and let them contain elastic molecules in a state of agitation which strike each other and the sides. Let the number of particles be equal in A & B but let those in A have equal velocities, if oblique collisions occur between them their velocities will become unequal & I have shown that there will be velocities of all magnitudes in A and the same in B only the sum of the squares of the velocities is greater in A than in B.
When a molecule is reflected from the fixed diaphragm CD no work is lost or gained.
If the molecule instead of being reflected were allowed to go through a hole in CD no work would be lost or gained, only its energy would be transferred from the one vessel to the other.
Now conceive a finite being who knows the paths and velocities of all the molecules by simple inspection but who can do no work, except to open and close a hole in the diaphragm, by means of a slide without mass.
Let him first observe the molecules in A and when lie sees one coming the square of whose velocity is less than the mean sq. vel. of the molecules in B let him open a hole & let it go into B. Next let him watch for a molecule in B the square of whose velocity is greater than the mean sq. vel. in A and when it comes to the hole let him draw and slide & let it go into A, keeping the slide shut for all other molecules.
Then the number of molecules in A & B are the same as at first but the energy in A is increased and that in B diminished that is the hot system has got hotter and the cold colder & yet no work has been done, only the intelligence of a very observant and neat fingered being has been employed. Or in short if heat is the motion of finite portions of matter and if we can apply tools to such portions of matter so as to deal with them separately then we can take advantage of the different motion of different portions to restore a uniformly hot system to unequal temperatures or to motions of large masses. Only we can't, not being clever enough.
Letter to Peter Guthrie Tait (11 Dec 1867). In P. M. Harman (ed.), The Scientific Letters and Papers of James Clerk Maxwell (1995), Vol. 2, 331-2.
Science quotes on:  |  Energy (185)  |  Maxwell’s Demon (2)  |  Particle (90)  |  Thermodynamics (27)


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
Quotations by: • Albert Einstein • Isaac Newton • Lord Kelvin • Charles Darwin • Srinivasa Ramanujan • Carl Sagan • Florence Nightingale • Thomas Edison • Aristotle • Marie Curie • Benjamin Franklin • Winston Churchill • Galileo Galilei • Sigmund Freud • Robert Bunsen • Louis Pasteur • Theodore Roosevelt • Abraham Lincoln • Ronald Reagan • Leonardo DaVinci • Michio Kaku • Karl Popper • Johann Goethe • Robert Oppenheimer • Charles Kettering  ... (more people)

Quotations about: • Atomic  Bomb • Biology • Chemistry • Deforestation • Engineering • Anatomy • Astronomy • Bacteria • Biochemistry • Botany • Conservation • Dinosaur • Environment • Fractal • Genetics • Geology • History of Science • Invention • Jupiter • Knowledge • Love • Mathematics • Measurement • Medicine • Natural Resource • Organic Chemistry • Physics • Physician • Quantum Theory • Research • Science and Art • Teacher • Technology • Universe • Volcano • Virus • Wind Power • Women Scientists • X-Rays • Youth • Zoology  ... (more topics)
Sitewide search within all Today In Science History pages:
Visit our Science and Scientist Quotations index for more Science Quotes from archaeologists, biologists, chemists, geologists, inventors and inventions, mathematicians, physicists, pioneers in medicine, science events and technology.

Names index: | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

Categories index: | 1 | 2 | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

- 100 -
Sophie Germain
Gertrude Elion
Ernest Rutherford
James Chadwick
Marcel Proust
William Harvey
Johann Goethe
John Keynes
Carl Gauss
Paul Feyerabend
- 90 -
Antoine Lavoisier
Lise Meitner
Charles Babbage
Ibn Khaldun
Euclid
Ralph Emerson
Robert Bunsen
Frederick Banting
Andre Ampere
Winston Churchill
- 80 -
John Locke
Bronislaw Malinowski
Bible
Thomas Huxley
Alessandro Volta
Erwin Schrodinger
Wilhelm Roentgen
Louis Pasteur
Bertrand Russell
Jean Lamarck
- 70 -
Samuel Morse
John Wheeler
Nicolaus Copernicus
Robert Fulton
Pierre Laplace
Humphry Davy
Thomas Edison
Lord Kelvin
Theodore Roosevelt
Carolus Linnaeus
- 60 -
Francis Galton
Linus Pauling
Immanuel Kant
Martin Fischer
Robert Boyle
Karl Popper
Paul Dirac
Avicenna
James Watson
William Shakespeare
- 50 -
Stephen Hawking
Niels Bohr
Nikola Tesla
Rachel Carson
Max Planck
Henry Adams
Richard Dawkins
Werner Heisenberg
Alfred Wegener
John Dalton
- 40 -
Pierre Fermat
Edward Wilson
Johannes Kepler
Gustave Eiffel
Giordano Bruno
JJ Thomson
Thomas Kuhn
Leonardo DaVinci
Archimedes
David Hume
- 30 -
Andreas Vesalius
Rudolf Virchow
Richard Feynman
James Hutton
Alexander Fleming
Emile Durkheim
Benjamin Franklin
Robert Oppenheimer
Robert Hooke
Charles Kettering
- 20 -
Carl Sagan
James Maxwell
Marie Curie
Rene Descartes
Francis Crick
Hippocrates
Michael Faraday
Srinivasa Ramanujan
Francis Bacon
Galileo Galilei
- 10 -
Aristotle
John Watson
Rosalind Franklin
Michio Kaku
Isaac Asimov
Charles Darwin
Sigmund Freud
Albert Einstein
Florence Nightingale
Isaac Newton



who invites your feedback
Thank you for sharing.
Today in Science History
Sign up for Newsletter
with quiz, quotes and more.