Heat can also be produced by the impact of imperfectly elastic bodies as well as by friction. This is the case, for instance, when we produce fire by striking flint against steel, or when an iron bar is worked for some time by powerful blows of the hammer.-- Hermann von Helmholtz
Name: Hermann von Helmholtz Type: Physicist Nationality: German Birth: August 31, 1821 Death: September 8, 1894 |