https://drray.org/gc-pilot-k7q4/ 2026-10-26T14:05:40Z Dr. Ray's Learning Center en General Chemistry Quiz Pilot 2026-10-26T14:05:37Z Blog https://drray.org/courses/transport-phenomena/steady-diffusion-liquids-solids-shells/ 2026-10-26T13:29:59Z Dr. Ray's Learning Center en Steady Diffusion in Liquids, Solids and Curved Shells 2026-10-26T13:29:55Z Blog https://drray.org/sim-unsteady-diffusion-b-embed/ 2026-10-26T13:27:37Z Dr. Ray's Learning Center en Unsteady Diffusion Explorer B (embed) 2026-10-26T13:27:34Z Blog https://drray.org/sim-unsteady-diffusion-a-3tab-embed/ 2026-10-26T10:34:54Z Dr. Ray's Learning Center en Unsteady Diffusion Explorer A, 3 Tabs (embed) 2026-10-26T10:34:51Z Blog https://drray.org/sim-porous-solids-embed/ 2026-10-26T10:32:24Z Dr. Ray's Learning Center en Diffusion in Porous Solids Explorer (embed) 2026-10-26T10:32:20Z Blog https://drray.org/sim-pseudo-steady-embed/ 2026-10-26T08:34:49Z Dr. Ray's Learning Center en Pseudo-Steady Evaporation Explorer (embed) 2026-10-26T08:34:46Z Blog https://drray.org/sim-bulk-flow-embed/ 2026-10-26T08:32:08Z Dr. Ray's Learning Center en Diffusion with Bulk Flow Explorer (embed) 2026-10-26T08:32:05Z Blog https://drray.org/sim-unsteady-diffusion-a-embed/ 2026-10-26T08:28:13Z Dr. Ray's Learning Center en Unsteady Diffusion Explorer A (embed) 2026-10-26T08:28:09Z Blog https://drray.org/sim-gas-diffusivity-embed/ 2026-10-26T05:14:49Z Dr. Ray's Learning Center en Gas Diffusivity Explorer (embed) 2026-10-26T05:14:47Z Blog https://drray.org/privacy-policy/ 2026-10-25T09:29:17Z Dr. Ray's Learning Center en Privacy Policy 2026-10-25T09:29:14Z Blog https://drray.org/courses/transport-phenomena/sim-finite-difference/ 2026-10-24T23:51:08Z Dr. Ray's Learning Center en Finite-Difference Diffusion 2026-10-24T23:51:06Z Blog https://drray.org/courses/transport-phenomena/sim-unsteady-diffusion-b/ 2026-10-26T13:31:48Z Dr. Ray's Learning Center en Unsteady Diffusion Explorer: Multidimensional Bodies 2026-10-24T23:50:37Z Blog https://drray.org/courses/transport-phenomena/sim-unsteady-diffusion-a/ 2026-10-26T02:20:10Z Dr. Ray's Learning Center en Unsteady Diffusion Explorer: 1D Geometries 2026-10-24T23:50:25Z Blog https://drray.org/courses/transport-phenomena/sim-porous-solids/ 2026-10-24T23:50:09Z Dr. Ray's Learning Center en Diffusion in Porous Solids Simulator 2026-10-24T23:50:07Z Blog https://drray.org/courses/transport-phenomena/sim-pseudo-steady/ 2026-10-26T08:40:19Z Dr. Ray's Learning Center en Pseudo-Steady Evaporation Simulator 2026-10-24T23:49:46Z Blog https://drray.org/courses/transport-phenomena/sim-bulk-flow/ 2026-10-26T00:43:24Z Dr. Ray's Learning Center en Stefan Tube and Bulk Flow 2026-10-24T23:49:32Z Blog https://drray.org/courses/transport-phenomena/sim-gas-diffusivity/ 2026-10-26T00:54:53Z Dr. Ray's Learning Center en Gas Diffusivity Explorer 2026-10-24T23:49:04Z Blog https://drray.org/courses/transport-phenomena/finite-difference-diffusion/ 2026-10-24T23:47:49Z Dr. Ray's Learning Center en When No Chart Fits: Finite Differences 2026-10-24T23:47:46Z Blog https://drray.org/courses/transport-phenomena/unsteady-diffusion-multidimensional/ 2026-10-26T13:35:22Z Dr. Ray's Learning Center en Multidimensional Bodies: the Product Rule 2026-10-24T23:47:34Z Blog https://drray.org/courses/transport-phenomena/gurney-lurie-charts/ 2026-10-26T10:37:25Z Dr. Ray's Learning Center en Slabs, Cylinders and Spheres: Gurney-Lurie Charts 2026-10-24T23:47:16Z Blog https://drray.org/courses/transport-phenomena/unsteady-diffusion-semi-infinite/ 2026-10-26T08:38:22Z Dr. Ray's Learning Center en Unsteady Diffusion: the Semi-Infinite Solid 2026-10-24T23:47:03Z Blog https://drray.org/courses/transport-phenomena/porous-solid-diffusion/ 2026-10-26T10:36:01Z Dr. Ray's Learning Center en Diffusion in Porous Solids: Knudsen, Transition and Effective Diffusivity 2026-10-24T23:46:43Z Blog https://drray.org/courses/transport-phenomena/pseudo-steady-evaporation/ 2026-10-26T08:41:17Z Dr. Ray's Learning Center en Pseudo-Steady Evaporation: the Stefan Tube and the Evaporating Droplet 2026-10-24T23:46:29Z Blog https://drray.org/courses/transport-phenomena/diffusion-with-bulk-flow/ 2026-10-26T08:39:21Z Dr. Ray's Learning Center en Steady Diffusion: Fick's Law, Equimolar Counterdiffusion and Stagnant Films 2026-10-24T23:46:04Z Blog https://drray.org/courses/transport-phenomena/estimating-diffusivities/ 2026-10-26T08:36:50Z Dr. Ray's Learning Center en Estimating Diffusivities: Gases and Liquids 2026-10-24T23:45:43Z Blog https://drray.org/courses/transport-phenomena/ 2026-10-26T13:36:30Z Dr. Ray's Learning Center en Transport Phenomena 2026-10-24T23:44:49Z Blog https://drray.org/courses/general-chemistry/rate-laws-and-reaction-order/ 2026-10-25T12:34:39Z Dr. Ray's Learning Center en Rate Laws and Reaction Order 2026-10-24T17:18:45Z Blog https://drray.org/courses/general-chemistry/reaction-rates/ 2026-10-25T12:33:48Z Dr. Ray's Learning Center en Reaction Rates and the Factors That Affect Them 2026-10-24T17:16:36Z Blog https://drray.org/courses/general-chemistry/gas-stoichiometry/ 2026-10-25T12:35:42Z Dr. Ray's Learning Center en Gas Stoichiometry 2026-10-24T16:21:40Z Blog https://drray.org/courses/general-chemistry/partial-pressures/ 2026-10-25T12:35:12Z Dr. Ray's Learning Center en Partial Pressures and Dalton's Law 2026-10-24T16:21:23Z Blog