Power Plant Engineering
Solar thermal power generation can be achieved by

Using flat plate collectors
Any of the mentioned system
Using focusing collector or heliostates
using a solar pond

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Power Plant Engineering
Isotopes of same elements have

Same atomic number and different masses
Different masses and different atomic numbers
Same chemical properties but different atomic numbers
Different chemical properties and same atomic numbers

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Power Plant Engineering
In nuclear fission

The electrons of the element change
None of the listed here
The molecules rearrange themselves to form other molecules
The original elements change into completely different elements

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