Physics, 13.12.2019 06:31, kennycooper3096
We know that the law of conservation of energy states that energy can not be created or destroyed. it only changes form. consider this energy transformation diagram. assume that the energy input in this case is chemical potential energy and the useful energy output is kinetic energy, specifically a small fan to keep you cool. the diagram also shows how to calculate the efficiency of the fan. if the law of conservation of energy holds true, explain why the efficiency of the fan is not 100%.
a) no machine is ever 100% efficient; some energy is not transformed.
b) some of the chemical potential energy is destroyed during the energy transformation.
c) some of the chemical potential energy is transformed into heat energy as well as kinetic energy.
d) conservation of energy also implies that some of the chemical potential energy is conserved or not used to run the fan.
Answers: 2
Physics, 22.06.2019 12:00, JvGaming2001
In a set amount of time, a battery supplies 25j of energy to an electric circuit that includes two different loads. one of the loads produces 10 j of heat energy during this time interval. how much heat energy is produced by the second load in this time? explain your answer
Answers: 3
Physics, 22.06.2019 19:30, alexmarche8637
Contains chemical energy. a. heat b. light c. natural gas
Answers: 2
Physics, 22.06.2019 21:00, emilyrobles
Which of the following statements comparing electron microscopy and light microscopy is false? which of the following statements comparing electron microscopy and light microscopy is false? both the electron microscope and the light microscope use the same wavelengths for illumination. images produced by light microscopes can be in color, whereas electron microscope images are black and white unless they are artificially colored. the electron microscope has greater resolution than the light microscope. electron microscopes can allow examination of viruses and internal cell structures, whereas light microscopes are limited to objects that are 0.5 micrometers and larger. request answer
Answers: 2
We know that the law of conservation of energy states that energy can not be created or destroyed. i...
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