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25. Which of the following elements is used in nuclear fusion reactions?

a) Hydrogen
b) Nitrogen
c) Uranium
d) Lead

26. What is the unit of Heat Energy?

a) Celsius
b) Fahrenheit
c) Kelvin
d) Joule


Sagot :

Final answer:

Nuclear fusion involves the use of hydrogen in reactions to produce energy measured in Joules.


Explanation:

Nuclear fusion involves the combination of lighter nuclei to form a heavier nucleus, releasing energy in the process. Hydrogen is the primary element used in nuclear fusion reactions due to its high abundance and capability to fuse into helium. The unit of Heat Energy is measured in Joules, representing the amount of energy transferred due to temperature changes.


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