{"id":3721,"date":"2023-01-09T10:21:59","date_gmt":"2023-01-09T10:21:59","guid":{"rendered":"https:\/\/9thclass.deltapublications.in\/?page_id=3721"},"modified":"2024-10-23T11:23:03","modified_gmt":"2024-10-23T11:23:03","slug":"s-10-g-relative-density","status":"publish","type":"page","link":"https:\/\/9thclass.deltapublications.in\/index.php\/s-10-g-relative-density\/","title":{"rendered":"S-10.g Relative Density"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color:#00056d;text-transform:uppercase\"><strong>Relative Density<\/strong><\/h2>\n\n\n\n<p class=\"has-text-color has-link-color has-huge-font-size wp-elements-87982a1885f28362b0345dcf26d18c66\" style=\"color:#74008b\"><strong>Key notes :<\/strong><\/p>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-f3e9bd833d290323682dc4bc56e1d690\" style=\"color:#000060\"><strong>Definition of Relative Density:<\/strong><\/p>\n\n\n\n<ul class=\"has-large-font-size wp-block-list\">\n<li>Relative density (RD) is the ratio of the density of a substance to the density of a reference substance, usually water (for liquids and solids) or air (for gases).<\/li>\n\n\n\n<li>It is also called <strong>specific gravity<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-8cb79be1614e1343f356e5dfd92241bb\" style=\"color:#000060\"><strong>Formula:<\/strong><\/p>\n\n\n\n<ul class=\"has-large-font-size wp-block-list\">\n<li>The formula for relative density is: <\/li>\n<\/ul>\n\n\n\n<p class=\"has-large-font-size\"><strong>Relative&nbsp;Density = Density&nbsp;of&nbsp;Substance \/ Density&nbsp;of&nbsp;Water<\/strong><\/p>\n\n\n\n<ul class=\"has-large-font-size wp-block-list\">\n<li class=\"has-large-font-size\">It is a dimensionless quantity because it&#8217;s a ratio of two similar quantities.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-2e3eb05413aa5e9241e956176865420d\" style=\"color:#000060\"><strong>No Units:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-large-font-size\">Since relative density is a ratio, it does not have any units. It is simply a number.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-30493ca56033ab57ff69e1d18230bfb5\" style=\"color:#000060\"><strong>Reference Substance (Water) :<\/strong><\/p>\n\n\n\n<ul class=\"has-large-font-size wp-block-list\">\n<li>For liquids and solids, the density of water ( which is 1 g\/cm\u00b3 or 1000 kg\/m\u00b3 at 4\u00b0C ) is used as the reference.<\/li>\n\n\n\n<li>If RD &gt; 1: The substance is denser than water and will sink in water.<\/li>\n\n\n\n<li>If RD &lt; 1: The substance is less dense than water and will float.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-9303716da3c2967b15cab22fd0504597\" style=\"color:#000060\"><strong>Importance of Relative Density:<\/strong><\/p>\n\n\n\n<ul class=\"has-large-font-size wp-block-list\">\n<li>It is used to compare the densities of different materials without needing to know their actual density values.<\/li>\n\n\n\n<li>It helps determine whether an object will float or sink in a liquid.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-53601364fdec938b0befba097bbb9adb\" style=\"color:#000060\"><strong>Applications:<\/strong><\/p>\n\n\n\n<ul class=\"has-large-font-size wp-block-list\">\n<li><strong>Floating and Sinking:<\/strong> Relative density helps in predicting whether an object will float or sink in water (e.g., ships, icebergs).<\/li>\n\n\n\n<li><strong>Hydrometer:<\/strong> A device used to measure the relative density of liquids.<\/li>\n\n\n\n<li><strong>Quality Control:<\/strong> Used in industries to compare the quality of materials (e.g., oil, metal).<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-8017f38cc323a3721e8ff11e72bffb96\" style=\"color:#000060\"><strong>Example Calculation:<\/strong><\/p>\n\n\n\n<ul class=\"has-large-font-size wp-block-list\">\n<li>If the density of a material is 2.5 g\/cm\u00b3 and the density of water is 1 g\/cm\u00b3, then the relative density of the material is: <\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-align-center has-large-font-size\"><strong>RD = 2.5 \/ 1 = 2.5<\/strong><\/p>\n\n\n\n<ul class=\"has-large-font-size wp-block-list\">\n<li>This means the material is 2.5 times denser than water.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-cafef265e8e5f4e502c8fb6489ff0044\" style=\"color:#000060\"><strong>Factors Affecting Relative Density:<\/strong><\/p>\n\n\n\n<ul class=\"has-large-font-size wp-block-list\">\n<li><strong>Temperature:<\/strong> The density of both the substance and the reference liquid (water) can change with temperature.<\/li>\n\n\n\n<li><strong>Impurities:<\/strong> The presence of impurities can alter the density and hence affect the relative density.<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-group has-large-font-size\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"has-text-color\" style=\"color:#d90000\">Let&#8217;s practice!<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/77216\/915\/843\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-48.png\" alt=\"\" class=\"wp-image-6484\" srcset=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-48.png 500w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-48-300x300.png 300w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-48-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/80493\/221\/927\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-51.png\" alt=\"\" class=\"wp-image-6485\" srcset=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-51.png 500w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-51-300x300.png 300w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-51-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Relative Density Key notes : Definition of Relative Density: Formula: Relative&nbsp;Density = Density&nbsp;of&nbsp;Substance \/ Density&nbsp;of&nbsp;Water No Units: Reference Substance (Water) : Importance of Relative Density: Applications: Example Calculation: RD = 2.5 \/ 1 = 2.5 Factors Affecting Relative Density: Let&#8217;s practice!<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-3721","page","type-page","status-publish","hentry","entry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3721","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/comments?post=3721"}],"version-history":[{"count":13,"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3721\/revisions"}],"predecessor-version":[{"id":15648,"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3721\/revisions\/15648"}],"wp:attachment":[{"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=3721"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}