https://www.khanacademy.org/science/ms-chemistry/xc370bc422b7f75fc:physical-properties-of-matter/xc370bc422b7f75fc:density/v/density-equation 2025-02-13T17:59:34.347326855Z Density equation Density measures how tightly matter is packed into a given space, calculated by dividing mass by volume (D = m/V). Knowing a substance’s density can help identify it. For irregular objects, scientists often measure volume using water displacement, where the volume change in water shows the object’s volume. Combining this measurement with the object’s mass provides a way to identify materials accurately regardless of their shape. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/3f882a3e-fe05-47b2-97df-a67b4da3a00d_1280_720_base.png Density equation Density measures how tightly matter is packed into a given space, calculated by dividing mass by volume (D = m/V). Knowing a substance’s density can help identify it. For irregular objects, scientists often measure volume using water displacement, where the volume change in water shows the object’s volume. Combining this measurement with the object’s mass provides a way to identify materials accurately regardless of their shape. https://cdn.kastatic.org/ka-youtube-converted/rW_33U7-8u8.mp4/rW_33U7-8u8.mp4 388 Floating Bodies https://www.khanacademy.org/science/ms-chemistry/xc370bc422b7f75fc:physical-properties-of-matter/xc370bc422b7f75fc:density/e/understand-density 2026-03-11T01:40:33.014543209Z Understand: density Check your understanding of density in this set of free, standards-aligned practice questions. Allen Ruch exercise https://www.khanacademy.org/science/ms-chemistry/xc370bc422b7f75fc:physical-properties-of-matter/xc370bc422b7f75fc:density/e/apply-density 2026-04-07T22:59:30.107127435Z Apply: density Apply your understanding of density in this set of free, standards-aligned practice questions. Allen Ruch exercise https://www.khanacademy.org/science/ncert-class-9-science/x7e8d66f732d28ce4:in-in-gravity/x7e8d66f732d28ce4:in-in-relative-density/v/relative-density-specific-gravity 2025-05-29T08:44:44.739717086Z Relative density (Specific gravity) Let's explore what relative density is. Dubverse video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Relative density (Specific gravity) Let's explore what relative density is. https://cdn.kastatic.org/ka-youtube-converted/BgMT2EpMDME.mp4/BgMT2EpMDME.mp4 199 Floating Bodies https://www.khanacademy.org/science/in-in-class9th-physics-india/in-in-gravity/in-in-pressure-in-liquids-archimedes-principle/v/archimedes-principle-buoyancy-fluids-physics-khan-academy 2020-06-23T07:22:41Z Archimedes principle & buoyancy Let's explore what Archimedes principle & buoyant force is. Mahesh Shenoy video https://cdn.kastatic.org/googleusercontent/673yqc6SsuCJSAK_hOLRfO5zd9rjEcj_apBe0ajwcJruIx_PKh8Lf9kF2WB_2ckYijW3H5lcwLuR4KmRG7bSRNY Archimedes principle & buoyancy Let's explore what Archimedes principle & buoyant force is. https://cdn.kastatic.org/ka-youtube-converted/VRXLvJPTV0k.mp4/VRXLvJPTV0k.mp4 863 Floating Bodies https://www.khanacademy.org/science/ap-college-physics-1/xf557a762645cccc5:fluids/xf557a762645cccc5:buoyant-force/e/the-buoyant-force 2025-11-17T21:30:52.352016529Z Buoyant force Check your understanding of buoyant force in this set of free practice questions. Emily Cizmas exercise https://www.khanacademy.org/science/in-in-class9th-physics-india/in-in-gravity/in-in-pressure-in-liquids-archimedes-principle/e/thrust-and-pressure 2026-04-07T09:22:30.618598699Z Pressure and Buoyancy Let's solve some questions! vibhor exercise https://www.khanacademy.org/science/in-in-class9th-physics-india/in-in-gravity/in-in-density-and-condition-for-floating/v/condition-for-floating-fluids-physics-khan-academy 2020-06-23T07:22:41Z Condition for floating Let's learn why floatation depends on density. Mahesh Shenoy video https://cdn.kastatic.org/googleusercontent/Y8JJZZN9grf265HT5dMD2dfrpGY6R9RqcgCnlzY1YUaX52993hQgD53g_oT397tdlgk379ra-FfTzd9YWHLF05N2og Condition for floating Let's learn why floatation depends on density. https://cdn.kastatic.org/ka-youtube-converted/eSc6N4zj3Zk.mp4/eSc6N4zj3Zk.mp4 673 Floating Bodies https://www.khanacademy.org/science/in-in-class9th-physics-india/in-in-gravity/in-in-density-and-condition-for-floating/e/predict-if-an-object-floats-or-sinks 2026-04-07T09:22:30.618598699Z Condition of floating Let's solve some questions! vibhor exercise https://www.khanacademy.org/science/ap-college-physics-1/xf557a762645cccc5:fluids/xf557a762645cccc5:untitled-354/v/fluid-pressure 2025-04-01T12:37:05.24852406Z Fluid pressure Pressure is the magnitude of the perpendicular force component exerted per unit area over a given surface area. Pressure is a scalar quantity. The pressure exerted by a fluid is the result of the interactions between the fluid’s particles and the surface with which those particles interact. The absolute pressure of a fluid at a given point is equal to the sum of a reference pressure, such as the atmospheric pressure, and the gauge pressure at that depth in the fluid. Pressure increases with depth in an incompressible fluid. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/8ce25aab-d4bc-4522-be3e-942e91070096_1280_720_base.png Fluid pressure Pressure is the magnitude of the perpendicular force component exerted per unit area over a given surface area. Pressure is a scalar quantity. The pressure exerted by a fluid is the result of the interactions between the fluid’s particles and the surface with which those particles interact. The absolute pressure of a fluid at a given point is equal to the sum of a reference pressure, such as the atmospheric pressure, and the gauge pressure at that depth in the fluid. Pressure increases with depth in an incompressible fluid. https://cdn.kastatic.org/ka-youtube-converted/p_WLHzF1SdI.mp4/p_WLHzF1SdI.mp4 948 Floating Bodies https://www.khanacademy.org/science/in-in-class11th-physics/in-in-class11th-physics-fluids/in-in-density-and-pressure/e/understanding-pressure 2026-04-08T00:54:09.631945657Z Understanding pressure Apply the formula of pressure in a fluid to variety of situations. srijan exercise https://www.khanacademy.org/science/mh-grade-8-science/x0f256b8de9c7cf34:force-and-pressure/x0f256b8de9c7cf34:pressure/e/effect-of-pressure-and-density-on-fluid-pressure 2026-04-07T22:23:57.656416987Z Effect of depth and density on fluid pressure Let's solve some questions! vibhor exercise https://www.khanacademy.org/science/ap-college-physics-1/xf557a762645cccc5:fluids/xf557a762645cccc5:untitled-354/e/density-and-pressure 2026-04-08T00:54:09.631945657Z Density and pressure Check your understanding of density and pressure in this set of free practice questions. Emily Cizmas exercise