Birth Date Cake O'Clock Birth Date Clock

Sergey Chaplygin

Sergey Chaplygin
Sergey Chaplygin, Russian physicist, mathematician, and engineer (d. 1942)

Sergey Alexeyevich Chaplygin was a Russian and Soviet physicist, mathematician, and mechanical engineer. He is known for mathematical formulas such as Chaplygin's equation and for a hypothetical substance in cosmology called Chaplygin gas, named after him.

5 April 1869

Random

Born on the same birth date (5 April 1869): Albert Roussel

Born on the same birth day (5 April): Andrea Arnold • Ariel López (footballer, born 1974) • Charlotte de Turckheim • Colin Bland • Franklin Chang-Díaz • Frederick Charles Ferdinand, Duke of Brunswick-Wolfenbüttel-Bevern • Henry Havelock • Jorge Martínez (footballer, born April 1983) • Joris Mathijsen • Juicy J • Krista Allen • Leo Stern • Luis de Agustini • Nelson Parraguez • Ronnie White • Tarek El-Said • Vakhtang Iagorashvili • Victoria Hamilton • Vítězslav Hálek • Zack Smith

Born in the same month (April 1869): Albert Roussel • Gustav Vigeland • Hans Poelzig • Harvey Cushing • Henri Désiré Landru • Hughie Jennings • Levon Shant • Mary Colter