Using equation for Bohr model radii to draw shell model for n=1 to 3, and calculating the velocity of a ground state electron. Created by Jay
Using shell model diagram to relate absorption to emission. Derives relationship between emitted photon and energy levels, the Balmer-Rydberg equation. Created by Jay.
Worked example of the first law of thermodynamics.
Lab investigating conservation of energy and projectile motion.
In this lesson on cosmic rays, students will explain two examples of a cosmic ray detector. Includes information about student preconceptions and a demonstration that requires a geiger counter and optional access to a small radioactive source that emits energetic helium nuclei (alpha particles), e.g., the mineral the mineral autunite, which contains uranium. This is activity two of four from The Cosmic Ray Telescope for the Effects of Radiation (CRaTER).
Sal shows that a commutator can be used in order to keep the loop of wire rotating in the magnetic field. Created by Sal Khan.
Fire as thermal conduction, convection, and radiation.
In this video David explains how the internal energy of a gas varies as a function of temperature. Created by David SantoPietro.
Some Convex Lens Examples. Created by Sal Khan.
Calculating electron energy for levels n=1 to 3. Drawing a shell model diagram and an energy diagram for hydrogen, and then using the diagrams to calculate the energy required to excite an electron between different energy levels. Created by Jay.
In this activity, students create two- and three-dimensional maps by using a data grid of an imaginary section of Earth's surface. They are challenged to create six different maps of various surface features and answer questions about them.
Students learn about the physical force of linear momentum movement in a straight line by investigating collisions. They learn an equation that engineers use to describe momentum. Students also investigate the psychological phenomenon of momentum; they see how the "big mo" of the bandwagon effect contributes to the development of fads and manias, and how modern technology and mass media accelerate and intensify the effect.
Animals have traits physical and behavioral that help them survive. Some traits help animals be more successful in survival than others.
In this short lab, students observe the movement of an air bubble in a small level, attached to a toy truck, as it is moved from a stop, to a steady speed and back to a stop. This gives a visual to the concepts positive acceleration, zero acceleration and negative acceleration.
Sal shows how to determine the magnetic force between two currents going in the same direction. Created by Sal Khan.
What happens when there's way more than two holes? Created by David SantoPietro.
An introduction to Virtual Image. Created by Sal Khan.
Kirchhoff's Current Law says the currents flowing into a node must add up to zero. Created by Willy McAllister.
Introduction to the vector dot product. Created by Sal Khan.
The Atlantic Coastal Plain tour is part of the New York Landscape Regions Collection of Google Earth Tours, created by a group of New York State science educators. This tour introduces students to glacial erratics on Long Island, the Ronkonkoma terminal moraine, and the Rock Hill erratic. Coastal erosion and deposition can be studied by viewing dunes, beaches, and wave cut banks.