The importance of hydrocarbons in our economy is detailed by its sourcing ... Specifically, students compare how the structure of the molecule can change the energy density of the fuel. Systems ...

those involving extreme loads, harsh climates, or long range where refueling/recharging is impractical simply require the ...

So it is an electric plane, but leverages the energy density of hydrocarbons to get around ... Even though hydrogen fuel only produces water vapor as a byproduct, it can still cause greenhouse ...

Such a propulsion system would provide an alternative to today's nonrenewable hydrocarbon fuels that are processed from crude ... who estimates that the cells are at least 20 times higher in energy ...