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The efficiency of most machines is less than 100%. Due to friction, energy seems to be lost. While the energy is not lost, it does work that is not useful or it is converted ___ energy.
decrease
both potential and kinetic
electric to thermal to sound
150 J
the sun
80%
thermal
producers
The organisms at the bottom of the food chain (food pyramid) are:
decrease
both potential and kinetic
electric to thermal to sound
150 J
the sun
80%
thermal
producers
As you move up through the levels of the energy pyramid, the amount of usable energy:
decrease
both potential and kinetic
electric to thermal to sound
150 J
the sun
80%
thermal
producers
A car engine is only 33% efficient, if the car requires 456 J of work to operate, what is the car’s work output?
decrease
both potential and kinetic
electric to thermal to sound
150 J
the sun
80%
thermal
producers
Calculate the overall efficiency of a device that uses two different processes with efficiencies of 80% and 15 %
decrease
both potential and kinetic
electric to thermal to sound
150 J
the sun
80%
thermal
producers
Where does the energy used to drive the water cycle comes from
decrease
both potential and kinetic
electric to thermal to sound
150 J
the sun
80%
thermal
producers
Carl eats a chocolate chip cookie and then climbs up a set of stairs. In doing so the cookie is transformed into ____________ energy.
decrease
both potential and kinetic
electric to thermal to sound
150 J
the sun
80%
thermal
producers
An iPod completes the following conversions:
decrease
both potential and kinetic
electric to thermal to sound
150 J
the sun
80%
thermal
producers
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