Renewable & Clean Energy

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Capturing Solar Energy with Photovoltaic Cells

Keywords: Lend an Experiment (LEx), photovoltaic cell, photovoltaics, resistance, solar, solar cells, solar energy

Did you know that the amount of power from a solar panel depends on what it's connected to? Explore how photovoltaic panels work, converting light into electrical energy, and learn how you can find the maximum power output from a solar panel.

This activity is part of the LEx (Lend an Experiment) Climate Kit. Students use solar panels to generate electrical power, exploring how light energy can be turned into electricity. Students connect the photovoltaic cells to different loads to find their peak power output.

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1 year 23 weeks ago

Generating Electricity: Wind and Water

Keywords: electricity, electricity generation, hydro-electricity, Lend an Experiment (LEx), wind, wind energy, wind turbines

A match made in energy heaven, wind and water are wonderful sources of clean, renewable energy. Let us see what goes into this electricity generation by making some wind and water turbines ourselves!

This activity is part of the LEx (Lend an Experiment) Climate Kit. Students generate their own wind or hydro electric power by constructing wind/water blades, exploring how mechanical energy from external sources can be harnessed and turned into electrical energy. The effect of different gear ratios can also be explored.

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1 year 24 weeks ago

Solar Energy: How do photovoltaics work?

Keywords: photovoltaics, solar, solar panel

How does energy from the sun get transformed into electricity? Learn how photovoltaic panels work, converting light into electrical energy.

Learn how photovoltaic panels work, converting light into electrical energy.

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1 year 29 weeks ago

Light Bulb Efficiency and Hand Crank Energy Generation

Keywords: breadboard, circuit, efficiency, electricity generation, energy, energy conversion, Lend an Experiment (LEx), lighting

What does it really take to power a light bulb?

This activity is part of the LEx (Lend an Experiment) Climate Kit. Students compare the power consumption of incandescent and LED bulbs through the use of hand crank generators and a simple circuit. Concepts include the conversion of mechanical to electrical energy, power and efficiency, and measurement estimation. There is an option to also investigate the efficiency of the hand crank generator.

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1 year 35 weeks ago

Renewable Energies

Keywords: biofuel, electricity generation, energy, hydro-electricity, Renewable, solar energy, wind energy

Energy is always required, whether it be for the production of goods, the supplying of services, or for transportation. Can we reduce our emissions by turning to clean sources of energy? If so, why haven't we already?

A large portion of humanity's energy demands are met using fossil fuels. Switching from fossil fuel generation to cleaner sources could greatly reduce the carbon emission put out every year. There are many ways to obtain energy cleanly, each with their own advantages and challenges.

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1 year 42 weeks ago

Low-E Glass

Keywords: emissivity, thermal radiation

How do you tell the difference between low-E and regular glass?

With a cheap IR thermometer, low-E glass can be easily distinguished from the normal variety.

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4 years 36 weeks ago

CO2e

Keywords: carbon dioxide, CO2e, terminology

What does the "e" mean?

A brief primer on the meaning of "CO2e"

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5 years 9 weeks ago

Commuting by car or cycle - which is better?

Keywords: bicycle, Carbon footprint, consumption, cycling, energy, Food, spreadsheets

It's not actually that clear...

We set out to find how much of a change it would make environmentally if one cycled instead of drove to work and then further expanded our findings to include the variables of diet composition and material goods ownership.

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5 years 10 weeks ago

Food, Energy and the Environment

Keywords: energy balance, Food, greenhouse gases

How do we feed nine billion people without destroying our environment?

The primary function of food is to provide our bodies with energy. Most of this energy comes ultimately from oil, with a little sunlight added, and its production is an energy-inefficient process.

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5 years 10 weeks ago

What do I (we) do about my (our) carbon footprint?

Keywords: Carbon footprint, reduction

A very frequent question asked by students after learning about climate change is "But what can I (we) do about it?". Here are some ideas, all of which have benefits in addition to reducing greenhouse gases, and so are worth considering even if you reject the idea of anthropogenic global warming completely.

Here is a set of suggestions for science students who wish to take action to reduce their own and their family's or community's carbon footprint. Most of the ideas are about education and attitude. We also list three achievable ways of reducing your annual emissions by least a tonne of carbon dioxide.

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5 years 26 weeks ago
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