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"Thanks, you helped me with my Thermodynamics Lab project! "
Esihle Ginya - University of Stellenbosch, South Africa
" I was so confused, you just made it all easy. Thanks " on Youtube, on the video : X-Rays created by Electron Transition.
- Esihle Ginya
University of Stellenbosch,
"Thank you" ...........regarding the video on Light Waves - Coherent Waves