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Showing posts from May, 2022

learning and teaching (7) London fire accident

https://wodewangzhishime.blogspot.com/2022/05/httpswodewangzhishime_28.html . Ref:  https://wodewangzhishime.blogspot.com/2021/09/httpswodewangzhishime_29.html . Eucharistize.  https://wodewangzhishime.blogspot.com/2021/10/httpswodewangzhishime_52.html   . John : In a lesson of anatomy, a professor kill a mouse and say to his students, "It's an educational example.  You guys should be alert of the details. ". Me: OK. John : If the students doze off and be non-alert of the details, what will happen ? Me: The professor will be angry,  because,  the professor regard this experiment as his favour to his students. How dare a student doze off ? _________^______ John: However, in a lesson of anatomy,  would a professor kill 80 mices together and say to his students,  it's an educational example and you guys are alert of the details ? Me: No,  an educational example doesn't need the death of 80 mices together. One mouse dying is far enough for an e...

sequential (60) - chemistry

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https://wodewangzhishime.blogspot.com/2022/05/httpswodewangzhishime_18.html . Ref: https://wodewangzhishime.blogspot.com/2022/07/cai-yourong-spy.html    .   . Note: Ceremic Resistor is poleless. .  . Me: Ceremic resistor has 2 layers. . Valance layer and conductive layer. John: Valance layer can't conduct because it has no pi bonding. .You can also say that it has no delocalize electrons. 1)  The thicker the valance layer, the higher the resistance. 2) The thiner the valance layer, the lower the resistance.

sequential (29) FM modulation (1)

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https://wodewangzhishime.blogspot.com/2022/04/httpswodewangzhishime_23.html . Ref: https://wodewangzhishime.blogspot.com/2023/02/translate-selected-text.html . . John: The 2 pictures above are FM modulation. Which one is correct. Me: Logically, the 2nd picture is correct. John (shaking head): No,. The 2nd picture is incorrect. Me: The 1st picture is correct. John: Yes,. . In the 1st picture, there're 2 circuit. They're circuit A and circuit B. In circuit A, the left-side branch is high frequency, 100 Mhz. However, the right-side  branch is low frequency, 80 Mhz. . John: As a result, circuit B is induced a electrical current of low frequency which is just 80 Mhz.