Regarding the answering skills of physics experiment questions, the mid-term exam is coming, thank you.

Design an experimental scheme, the simpler the better, the kind that is clear at a glance, and it is good to combine what you have learned.

Desktop problem ... first find out all the physical quantities, and some known and unknown data in the data value problem can usually be found through a set of formulas.

The mid-term exam is coming, and I'm nervous. If you enter our school, I'll invite you to the canteen for dinner.