Energy efficiency is a very important idea that we see in our everyday lives.
In simple terms, it means how much good work we can get from the energy we use. The more efficient something is, the less energy it wastes.
Energy efficiency is all about comparing the useful work we get to the total energy we put in.
We often show this idea with a simple formula:
Efficiency (%) = (Useful Energy Output / Total Energy Input) x 100
Let's look at an example with a light bulb.
If a light bulb uses 100 units of energy and gives off 80 units of light, we can figure out its efficiency like this:
Efficiency = (80 / 100) x 100 = 80%
Home Appliances: Washing machines that use less water and less energy are more efficient.
Transportation: Electric cars usually turn more energy into driving power than cars that run on gasoline.
Heating: Homes with good insulation keep heat inside better, which means less energy is needed to stay warm.
By learning about energy efficiency, we can make better choices that save us money and help the planet!
Energy efficiency is a very important idea that we see in our everyday lives.
In simple terms, it means how much good work we can get from the energy we use. The more efficient something is, the less energy it wastes.
Energy efficiency is all about comparing the useful work we get to the total energy we put in.
We often show this idea with a simple formula:
Efficiency (%) = (Useful Energy Output / Total Energy Input) x 100
Let's look at an example with a light bulb.
If a light bulb uses 100 units of energy and gives off 80 units of light, we can figure out its efficiency like this:
Efficiency = (80 / 100) x 100 = 80%
Home Appliances: Washing machines that use less water and less energy are more efficient.
Transportation: Electric cars usually turn more energy into driving power than cars that run on gasoline.
Heating: Homes with good insulation keep heat inside better, which means less energy is needed to stay warm.
By learning about energy efficiency, we can make better choices that save us money and help the planet!