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Sir George Stokes and Fluid Dynamics

Sir George Stokes and Fluid Dynamics

Harald Sack
On February 1, 1903, Irish mathematician, physicist, politician and theologian Sir George Gabriel Stokes, 1st Baronet, passed away. Stokes made seminal contributions to fluid dynamics, optics, and mathematical physics including the first version of what is now known as Stokes’ theorem. “It is very difficult for us, placed as we have been from earliest childhood in a condition of training, to say what would have been our feelings had such training never…
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geology
Arthur Holmes and the Age of the Earth

Arthur Holmes and the Age of the Earth

Harald Sack
On January 14, 1890, British geologist Arthur Holmes was born. Holmes pioneered the use of radiometric dating of minerals and was the first earth scientist to grasp the mechanical and thermal implications of mantle convection, which led eventually to the acceptance of plate tectonics. “There are few problems more fascinating than those that are bound up with the bold question: How old is the Earth? With insatiable curiosity men have been trying…
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physics
James Prescott Joule and the True Nature of Heat

James Prescott Joule and the True Nature of Heat

Tabea Tietz
On December 24, 1818, English physicist and brewer, James Prescott Joule was born. Joule studied the nature of heat, and discovered its relationship to mechanical work. This led to the law of conservation of energy, which led to the development of the first law of thermodynamics. The SI derived unit of energy, the joule, is named after James Joule. “My object has been, first to discover correct principles and then to suggest their practical…
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physics
Lord Kelvin and the Analysis of Thermodynamics

Lord Kelvin and the Analysis of Thermodynamics

Harald Sack
On December 17, 1907, Irish physicist William Thomson, 1st Baron Kelvin of Largs, passed away. Thomson did important work in the mathematical analysis of electricity and formulation of the first and second laws of thermodynamics. Absolute temperatures are stated in units of kelvin in his honour. He was ennobled in 1892 in recognition of his achievements in thermodynamics. Go, wondrous creature! mount where Science guides; Go measure earth, weigh air, and state…
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physics
Jean-Charles-Athanase-Peltier and the Peltier Effect

Jean-Charles-Athanase-Peltier and the Peltier Effect

Harald Sack
On October 27, 1845, French physicist Jean Charles Athanase Peltier passed away. Peltier is best known today for the introduction of the eponymous Peltier effect, a thermoelectrical effect, i.e. the presence of heating or cooling at an electrified junction of two different conductors, as well as for the electrostatic induction. Jean Charles Athanase Peltier – Early Years as Clockmaker Peltier was born to a poor family; his father earned a living as a…
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engineering
Macquorn Rankine and the Laws of Thermodynamics

Macquorn Rankine and the Laws of Thermodynamics

Harald Sack
On July 5, 1820, Scottish mechanical engineer William John Macquorn Rankine was born. He was a founding contributor, with Rudolf Clausius and William Thomson (Lord Kelvin), to the science of thermodynamics, particularly focusing on the first of the three thermodynamic laws. “Discrepancy between theory and practice, which in sound physical and mechanical science is a delusion, has a real existence in the minds of men; and that fallacy, through rejected by their…
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physics
Nicolas Sadi Carnot and the Science of Thermodynamics

Nicolas Sadi Carnot and the Science of Thermodynamics

Harald Sack
On June 1, 1796, French military engineer and physicist Nicolas Léonard Sadi Carnot was born. He is often described as the “father of thermodynamics“. In particular, Carnot gave the first successful theory of the maximum efficiency of heat engines. Carnot’s work attracted little attention during his lifetime, but it was later used by Rudolf Clausius and Lord Kelvin to formalize the second law of thermodynamics and define the concept of entropy. Carnot Background Sadi…
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physics
Rudolf Clausius and the Science of Thermodynamics

Rudolf Clausius and the Science of Thermodynamics

Tabea Tietz
On January 2, 1822, German physicist and mathematician Rudolf Julius Emanuel Clausius was born. He is considered one of the central founders of the science of thermodynamics, who introduced the concept of entropy in 1865. “If for the entire universe we conceive the same magnitude to be determined, consistently and with due regard to all circumstances, which for a single body I have called entropy, and if at the same time we introduce…
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biology
Charles Darwin’s ‘On the Origin of Species’

Charles Darwin’s ‘On the Origin of Species’

Tabea Tietz
On November 24, 1859, famous biologist and founder of the science of evolution Charles Darwin published his seminal treaty ‘On the Origin of Species‘, which is considered to be the foundation of evolutionary biology. “And thus, the forms of life throughout the universe become divided into groups subordinate to groups.” – Charles Darwin, On the Origin of Species (1859) Evolution before Darwin In later editions of seminal book, Darwin traced evolutionary ideas back…
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physics
André-Marie Ampère and Electromagnetism

André-Marie Ampère and Electromagnetism

Tabea Tietz
On January 20, 1775, French physicist and mathematician André-Marie Ampère was born, after whom the unit of measurement of electric current, the ampere, is named. He is generally considered as one of the main founders of the science of classical electromagnetism, which he referred to as “electrodynamics“. A Child Prodigy André-Maria Ampère was born into a well educated family and influenced by the theories of Jean-Jacques Rousseau early. He was home schooled by his…
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