Archive for Archimedes

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1588 – Mersenne – bio

Marin Mersenne was born in France in 1588 and studied theology, philosophy, mathematics and music. He is known for some of the first major contributions to acoustics and for his work compiling a list of large prime numbers by using the form 2^p – 1 where p is a known prime number. [raise 2 to […]

1838 – Mach – bio

Ernst Mach was born in 1838 in what was then part of Austria and now part of the Czech Republic. He was a physicist and philosopher and studied wave dynamics, fluid mechanics and shock waves. He was the first to study super-sonic motion. Multiples of the speed of sound are now designated by numbers named […]

1596 – Descartes – bio

Rene Descartes was born in France in 1596. He is known as “the father of modern philosophy” and also contributed to mathematics and general science. The cartesian coordinate system is named for him and he created analytic geometry. He also did some work in the field of optics, with both refraction and reflection. Prior to […]

-0310 – Aristarchus – bio

Aristarchus was born on the island of Samos in Greece around -0310. He was a mathematician and philospher and probably the first on record to propose that the Earth circled around the Sun instead of the other way around. He wrote a work titled, “On the Sizes and Distances of the Sun and Moon” which […]

-1900 – pi

pi or &#960 is a constant but irrational number that represents the ratio between the area of any circle and the square of its radius. This gives us the famous formula: area = &#960 x r2, which can be approximated by 22/7 or 3.14159. pi can also be expressed by dividing the circumference of any […]

-0287 – Archimedes – bio

Archimedes was a Greek engineer, inventor, mathematician and scientist born in Syracuse, Sicily around -287. He explained how the lever works, invented the “Archimedes screw” pump, and designed many military machines for attack and siege. He discovered how buoyancy in water works by displacement and this is now known as Archimedes Principle. He invented a […]