Energy II


Welcome to class! 

In today’s class, we will be talking more about energy. Enjoy the class!

Energy II


Forms transformation

An energy transformation is the change of energy from one form to another. Energy transformations occur everywhere every second of the day. There are many different forms of energy such as thermal, mechanical, electrical, nuclear, sound, electromagnetic, and chemical.

The law of conservation of energy states that energy is always conserved in the universe and simply changes from one form to another, many energy transformations are taking place constantly.

Example of energy transformation
  1. The sun transforms nuclear energy into ultraviolet, infrared, and gamma energy all forms of electromagnetic energy.
  2. A natural gas stove converts chemical energy from burning into thermal energy used to cook food.
  3. A toaster transforms electrical energy into thermal energy.
  4. Our bodies convert chemical energy from food into mechanical and electrical energy to allow us to move.
  5. A blender transforms electrical energy into mechanical energy.
Uses of energy
  • Commercial uses of energy:

Commercial use of energy is what energy is used for in the commercial sector. This includes heating, cooling and lighting of commercial buildings and spaces, the power used by companies and business throughout our cities for computers, fax machines, workstations, copiers just to name but a few. The uses of energy in the commercial space is more or less similar to the uses in the industrial space save for personal uses. Energy-saving here though is targeted at the corporate world rather than at individuals. Players in the sector of energy conservation should introduce energy-saving campaigns to curb the culture of waste present at our places of work.

  • Transportation:

Transportation is one hundred per cent dependent on energy. Over seventy per cent of petroleum used goes into the transport sector. The transport sector includes all vehicles from personal cars to trucks to buses and motorcycles. It also includes aircraft, trains, ship and pipelines. The transportation sector can be very vital in the overall quest for energy conservation. Innovations such as the introduction of more fuel-efficient vehicles and the development of alternative sources of energy for our transport system can greatly help in the saving of energy. Efforts at energy conservation can be made on a global scale if we factor in the uses and deal with them one by one. If we focus on them as an individual uses rather than trying to find a solution as a whole, we will make much bigger strides in conservation.

  • Residential uses of energy:

When we talk about residential uses of energy, these are the most basic uses of energy. They include watching television, washing clothes, heating and lighting the home, taking a shower, working from home on your laptop or computer, running appliances and cooking. Residential uses of energy account for almost forty per cent of total energy use globally.


In our next class, we will be talking about Renewable and Non-Renewable Energy.  We hope you enjoyed the class.

Should you have any further question, feel free to ask in the comment section below and trust us to respond as soon as possible.

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