An introduction to Beams and their types
Common types of beams and their associated forces ZIMSEC O Level Combined Science Notes: An introduction to Beams and their types
- A beam is any material that is supported so that it can hold a load
- A simple beam is a length of material e.g steel supported along its length so that […]
Functional organisational structure 
Ox-bow lake. Image credit
Goods in a removals warehouse. Image credit 

Harare has a sphere of influence that covers the whole country. Image credit 
Carbon can be used to reduce copper oxide
A simple AC generator. Image credit electronics-tutorials.ws ZIMSEC O Level Combined Science Notes: The Alternating Power generator