Question

18) Which combination of statements is most accurate? [Enter your answer as a string of the...

18) Which combination of statements is most accurate? [Enter your answer as a string of the letter options you believe are correct. For instance, if you think options A, D, and E are correct, then enter "ADE". NOTE: There are only 5 tries for this problem.]

A) The random jiggling of atoms in a material is an example of source energy.
B) Source energy can never be purely converted into mechanical energy.
C) Macroscopic processes that change source energy always increase thermal energy as well.
D) Mechanical energy can be converted back into source energy, with a corresponding increase in thermal energy.
E) None of the above

Homework Answers

Answer #1

(A) True ,
Source energy is provided by the random motion of the atoms.
As we calcualte kinetic energy also due to random motion of molecule.
(B) True,
We can not convert complete source energy into mechanical energy because some energy
will also increase in thermal due to friction available and other realistic parameters.
(C) False,
It is not necessary that always energy can be seen as thermal energy , it can be available in other form also.
(D) True,
When we try to convert mechanical energy back into source energy thermal energy can increase.
therefore correct options should be
ABD.

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