Khan Academy: Diagnosing Strokes With Imaging Ct, Mri, and Angiography

Physical or earth scientists construct this clever contraption to demonstrate how size effects frequency. Several paper rings of various sizes are taped onto a board and shaken to create vibrations. The resonant frequencies are easily...

Cancerous tissues contain more water than normal tissue, which causes the cancerous tissue to resonate longer on the screen and be seen. High school learners can see how MRIs detect tumors in someone's head. Radio transmitters emit their...

Is post-stroke inflammation common? Khan Academy fills us in with what it is and why it occurs. [5:55]

Sal reviews the process of naming linear alkanes with branching starting from the structure and drawing the structures based on the name. [11:04]

Naming conventions for alkane chains that have an ethyl group branch is detailed by Sal Khan. [2:53]

For the reaction between Fe and HCl, know how to identify the half reactions and what is getting oxidized and reduced. [6:01]

Explains what intramolecular and intermolecular forces are and the different types for each. Includes lots of examples.

A thorough investigation of magnetic levitation; this activity has four parts. First, physical scientists play with a wooden dowel and three disc magnets to review polarity and repelling action. Then they experiment with...

A video lecture giving examples of how to find the pH and pOH of strong acids and bases. Also learn how to calculate the pKw of water. [14:49]

Your advanced physics class will appreciate this lesson plan in which they use magnetic field sensors to determine the relationship between the number of turns per meter of a solenoid and the magnetic field produced. The materials for...