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 Investigating density 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