Johannes Diderik van der Waals higher temperatures. Nitrogen, oxygen, hydrogen, and helium subsequently succumbed to liquefaction. Heike Kamerlingh Onnes was significantly influenced by the pioneer work of van der Waals. In 1908, Onnes became the first to make liquid helium; this led directly to his 1911 discovery of superconductivity. Van der Waals started his career as a school teacher. He became the first physics professor of the University of Amsterdam when in 1877 the old Athenaeum was upgraded to Municipal University. Van der Waals won the 1910 Nobel Prize in physics for his work on the equation of state for gases and liquids. Johannes Diderik
What Kate Did 'Dad?' Hurley comments that he did not expect Rose's husband to be white, before Jack quickly changes the subject. The producers felt it was important to address that they are an interracial couple, and that Hurley was saying what the audience would be thinking. Caldwell agreed with them and thought it would be odd if the issue was not addressed. Anderson also was glad that Hurley brought up the issue, and liked that Jack did not pay any attention. The episode gained 21.54 million American viewers in its first airing. What Kate Did "What Kate Did" is the 34th episode