February 2025

Experiment: Burning fuels

By |2025-02-12T09:02:25+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Burning Fuels Burning Fuels ZIMSEC O Level Combined Science Notes: Experiment: Burning fuels

Aim: To burn and investigate the nature of fuels

Materials: methylated spirits/alcohol, candle, meths burner, bunsen burner, paraffin, tin lid or porcelain dish, tongs

Method

  1. Light a meths burner and observe the flame
  2. Burn a small amount of alcohol on a tine lid, […]
Read More
Comments Off on Experiment: Burning fuels

Electric cells: Introduction

By |2025-02-12T09:33:41+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Duracell electric cells. Image credit linkedin.com Duracell electric cells. Image credit linkedin.com ZIMSEC O Level Combined Science Notes: Introduction to electric cells

  • An electric cell converts chemical energy into electrical energy
  • Two metal electrodes are dipped into an electrolyte
  • During the chemical reaction that takes place in the cell
  • One electrode […]
Read More
Comments Off on Electric cells: Introduction

Uses of generators

By |2025-02-12T08:58:47+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Generators have many uses.Image credit wheelerdealers.co.zw Generators have many uses.Image credit wheelerdealers.co.zw ZIMSEC O Level Combined Science Notes:  Uses of generators

  • In Zimbabwe there a number of Power Stations that generate electricity
  • In practice most generators are AC rather than  DC generators
  • At Kariba there is a Hydro Electric station

    • […]

Read More
Comments Off on Uses of generators

Uses of Trusses

By |2025-02-12T09:14:28+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

A girder bridge made of trusses. Image credit luetke-modellbahn.de A girder bridge made of trusses. Image credit luetke-modellbahn.de ZIMSEC O Level Combined Science Notes: Uses of Trusses

  • Trusses are used extensively in large civil structures
  • One their uses is to make girder bridges
  • These bridges are designed in such a way […]
Read More
Comments Off on Uses of Trusses

Introduction to bridges

By |2025-02-12T09:29:06+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

A simple bridge. Image credit pinimg.com A simple bridge. Image credit pinimg.com ZIMSEC O Level Combined Science Notes: Introduction to bridges

  • A bridge is a structure that allows a road, path or railway line to cross a river/depression/gully/gap
  • The simplest bridge can be made using a beam lying across the gap

    • […]

Read More
Comments Off on Introduction to bridges

Pumps: Force pump

By |2025-02-12T09:04:42+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

A solar force pump. Image credit sunfuel.co.in A solar force pump. Image credit sunfuel.co.in ZIMSEC O Level Combined Science Notes: Pumps: Force pump

  • A force pump:
  • Has a cylinder, piston, two valves and a spout (outlet)
  • It makes use of atmospheric pressure to force fluid/water into the pump through valves
  • The […]
Read More
Comments Off on Pumps: Force pump
Toggle Sliding Bar Area
Go to Top