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Find the standard deviation for the given probability distribution.
Earth's Mantle
The layer of the Earth between the crust and the core, composed of silicate rocks that are rich in magnesium and iron.
Fuel Cell
A device that converts the chemical energy from a fuel into electricity through a chemical reaction with oxygen or another oxidizing agent, often hydrogen-based.
Conversion Efficiencies
The ratio of useful energy output to total energy input in a system, measuring how effectively energy resources are converted and used.
Biomass Fuels
Renewable energy derived from organic materials such as wood, waste, and alcohol fuels used for generating electricity or producing heat.
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