#1
Which law of thermodynamics states that energy cannot be created or destroyed, only transformed from one form to another?
First Law
ExplanationLaw stating energy conservation principle.
#2
What is the SI unit of energy?
Joule
ExplanationBasic unit for measuring energy.
#3
Which form of energy is associated with the motion of atoms and molecules?
Kinetic energy
ExplanationEnergy due to motion.
#4
Which of the following is an example of potential energy?
A stretched rubber band
ExplanationIllustration of stored energy.
#5
What is the efficiency of a machine that consumes 500 J of energy to do 250 J of work?
0.75
ExplanationRatio of useful output to input energy.
#6
In what form is energy typically lost in most energy conversion processes?
Heat
ExplanationCommonly dissipated form of energy.
#7
What is the principle behind a solar panel's operation?
Photoelectric effect
ExplanationProcess of converting light into electricity.
#8
Which law of thermodynamics deals with the concept of entropy?
Second Law
ExplanationLaw describing energy quality degradation.
#9
Which law of thermodynamics states that as energy is transferred or transformed, more and more of it is wasted?
Second Law
ExplanationPrinciple of energy degradation.