Physics of waves: Covers Quantum Waves, sound waves, and light waves. Easy to understand explanation of refraction, reflection, and many other topics.
Important correction: In the section of refraction, the colors are reversed. Violet light slows down in water more than red light, and violet light therefore bends more than red light when it transitions from air to water.

Arithmetic Progression (AP) and Geometric Progression (GP) - Both super important concepts explained in this video. ⁣To summarise, An arithmetic Progression is a sequence with the difference between two consecutive terms constant. And a geometric Progression is a sequence with the ratio between two consecutive terms constant.


⁣In this video, we will learn:
0:00 Arithmetic Sequence
0:41 nth Term of Arithmetic Sequence
1:20 Average of n Terms in Arithmetic Sequence
1:34 Sum of Terms in Arithmetic Sequence
2:38 Geometric Sequence or Progression
4:11 nth Term of Geometric Sequence
4:16 Sum of Terms in Geometric Sequence

Easy to understand animation explaining all basic concepts.

This is an excerpt from the luncheon keynote presentation of Dr. Wade Nobles at the 2006 CHEIKH ANTA DIOP Conference in Philadelphia, Pa. Presentation titled, 'AFRICAN RESURGENCE: The Concept of Seeking the Sakhu.

A few months ago we started a trial to irrigate Cassava with drip irrigation. We wanted to give you an update on the trial.

The Food and Agriculture Organisation FAO, is calling for the transformation of Africa’s agri-food system to make healthy diets more affordable. A new report shows Africans are missing out on the nutritiuos foods such as fruits, vegetables and animal proteins due to high costs. The report also shows the number of undernourished in the continent has risen to over two hundred and fifty million people.

This video highlights the activities of a project on improving value addition and marketing of milk for smallholders in the East African region. The project is coordinated at the Kenya Agriculture and Livestock Research Organisation (KALRO) and sponsored by East African Agricultural Productivity Project (EAAPP)