A manufacturing company is looking to revolutionise the way water can be heated in the home. Fuels can be compared using energy density and specific energy.
Match, by drawing a line, energy density and specific energy to the quantity they compare and their units.
Kerosene is a clean and cost−effective energy source for heating water. The specific energy of Kerosene is 48 × 106 J kg−1 and the energy density is 3.3 × 1010 J m−3.
Calculate the density of Kerosene.
A new kettle is being developed that claims to be 75% efficient.
Sketch a Sankey diagram on the squares below to represent this situation.
In a new prototype kettle, claimed to be 95% efficient, 300 000 J of energy is required to raise the temperature of the full kettle of water from room temperature to boiling point.
Calculate the amount of energy wasted by the kettle.
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