22 January 2025

Rectangular Compass


 Drawing circles using two pencils and a rectangular-shaped compass. Placing pencils in different holes, circles of various sizes can be created. Many of the students found this easier than using a regular compass.

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“Why the Rate-Determining Step Is Not Always Obvious” A-Level Chemistry

  “Why the Rate-Determining Step Is Not Always Obvious” A student sees a three-step mechanism and immediately chooses the slowest-looking s...