{"id":139,"date":"2026-04-10T02:53:10","date_gmt":"2026-04-10T02:53:10","guid":{"rendered":"https:\/\/books.gw-project.org\/age-dating-young-groundwater\/chapter\/ch060-xhtml\/"},"modified":"2026-05-11T17:47:14","modified_gmt":"2026-05-11T17:47:14","slug":"exercise-7","status":"publish","type":"chapter","link":"https:\/\/books.gw-project.org\/age-dating-young-groundwater\/chapter\/exercise-7\/","title":{"raw":"Exercise\u00a07","rendered":"Exercise\u00a07"},"content":{"raw":"<div id=\"exercise-7\" class=\"level1\">\r\n<ol type=\"a\">\r\n \t<li>The[latex]{\\ SF}_{6}[\/latex] concentration of a groundwater sample collected in 2018 was 2.6\u00a0fmole\/kg. An fmole is a femtomole which is an amount of substance equal to 10<sup>\u221215<\/sup> moles. The mean annual temperature in the recharge zone of the aquifer is 15\u00a0\u00b0C and the elevation of the water table in the recharge zone is 800\u00a0m.<\/li>\r\n<\/ol>\r\n<div data-custom-style=\"First Paragraph\">\r\n\r\nCalculate the tracer age of this sample.\r\n\r\n<\/div>\r\n<ol start=\"2\" type=\"a\">\r\n \t<li>An analysis of noble gases indicates that the sample in Exercise\u00a07(a) contains 0.003\u00a0ccSTP\/g of UA.<\/li>\r\n<\/ol>\r\n<div data-custom-style=\"First Paragraph\">\r\n\r\nRecalculate the tracer age of the sample including excess air.\r\n\r\n<\/div>\r\n<div data-custom-style=\"Body Text\">\r\n\r\n<a href=\"\/age-dating-young-groundwater\/chapter\/solution-exercise-7\/\"><span data-custom-style=\"Hyperlink\"><u>Solution to Exercise\u00a07<\/u><\/span><\/a>\u2ba7\r\n\r\n<\/div>\r\n<div data-custom-style=\"Body Text\">\r\n\r\n<a href=\"\/age-dating-young-groundwater\/chapter\/5-4-calculation-of-tracer-age\/\"><span data-custom-style=\"Hyperlink\"><u>Return to where text linked to Exercise\u00a07<\/u><\/span><\/a>\u2ba5\r\n\r\n<\/div>\r\n<\/div>","rendered":"<div id=\"exercise-7\" class=\"level1\">\n<ol type=\"a\">\n<li>The[latex]{\\ SF}_{6}[\/latex] concentration of a groundwater sample collected in 2018 was 2.6\u00a0fmole\/kg. An fmole is a femtomole which is an amount of substance equal to 10<sup>\u221215<\/sup> moles. The mean annual temperature in the recharge zone of the aquifer is 15\u00a0\u00b0C and the elevation of the water table in the recharge zone is 800\u00a0m.<\/li>\n<\/ol>\n<div data-custom-style=\"First Paragraph\">\n<p>Calculate the tracer age of this sample.<\/p>\n<\/div>\n<ol start=\"2\" type=\"a\">\n<li>An analysis of noble gases indicates that the sample in Exercise\u00a07(a) contains 0.003\u00a0ccSTP\/g of UA.<\/li>\n<\/ol>\n<div data-custom-style=\"First Paragraph\">\n<p>Recalculate the tracer age of the sample including excess air.<\/p>\n<\/div>\n<div data-custom-style=\"Body Text\">\n<p><a href=\"\/age-dating-young-groundwater\/chapter\/solution-exercise-7\/\"><span data-custom-style=\"Hyperlink\"><u>Solution to Exercise\u00a07<\/u><\/span><\/a>\u2ba7<\/p>\n<\/div>\n<div data-custom-style=\"Body Text\">\n<p><a href=\"\/age-dating-young-groundwater\/chapter\/5-4-calculation-of-tracer-age\/\"><span data-custom-style=\"Hyperlink\"><u>Return to where text linked to Exercise\u00a07<\/u><\/span><\/a>\u2ba5<\/p>\n<\/div>\n<\/div>\n","protected":false},"author":7,"menu_order":42,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-139","chapter","type-chapter","status-publish","hentry"],"part":39,"_links":{"self":[{"href":"https:\/\/books.gw-project.org\/age-dating-young-groundwater\/wp-json\/pressbooks\/v2\/chapters\/139","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/books.gw-project.org\/age-dating-young-groundwater\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/books.gw-project.org\/age-dating-young-groundwater\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/books.gw-project.org\/age-dating-young-groundwater\/wp-json\/wp\/v2\/users\/7"}],"version-history":[{"count":2,"href":"https:\/\/books.gw-project.org\/age-dating-young-groundwater\/wp-json\/pressbooks\/v2\/chapters\/139\/revisions"}],"predecessor-version":[{"id":369,"href":"https:\/\/books.gw-project.org\/age-dating-young-groundwater\/wp-json\/pressbooks\/v2\/chapters\/139\/revisions\/369"}],"part":[{"href":"https:\/\/books.gw-project.org\/age-dating-young-groundwater\/wp-json\/pressbooks\/v2\/parts\/39"}],"metadata":[{"href":"https:\/\/books.gw-project.org\/age-dating-young-groundwater\/wp-json\/pressbooks\/v2\/chapters\/139\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/books.gw-project.org\/age-dating-young-groundwater\/wp-json\/wp\/v2\/media?parent=139"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/books.gw-project.org\/age-dating-young-groundwater\/wp-json\/pressbooks\/v2\/chapter-type?post=139"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/books.gw-project.org\/age-dating-young-groundwater\/wp-json\/wp\/v2\/contributor?post=139"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/books.gw-project.org\/age-dating-young-groundwater\/wp-json\/wp\/v2\/license?post=139"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}