How Many Licks? remaining on the chart for 20 weeks. "How Many Licks?" also charted in several other countries. It peaked at number six on the Dutch Top 40 chart, and remained on the chart for 13 weeks. The single reached number seven on the Ultratop chart in the Flanders region of Belgium, also remaining on that chart for 13 weeks. It further peaked at number 58 on the German Singles Chart, remaining for eight editions. The song's music video, directed by Francis Lawrence, was shot in the Sylmar, Los Angeles neighborhood of Los Angeles on October 3 and 4, 2000, and premiered
Neutron cross section of the order of "π r" or roughly 10 cm (thus justifying the definition of the barn). However, if measured experimentally ( "σ" = "R" / ("Φ N") ), the experimental cross sections vary enormously. As an example, for slow neutrons absorbed by the (n, γ) reaction the cross section in some cases (xenon-135) is as much as 2,650,000 barns, while the cross sections for transmutations by gamma-ray absorption are in the neighborhood of 0.001 barn (See here for more example of cross sections). The "nuclear cross section" is consequently a purely conceptual quantity representing how big the nucleus should