Answer:
The length of the two wires
Explanation:
A control variable is what you keep the same through the whole experiment so therefore it could be both length and diameter
Answer: Oxidation of Glucose,Glycolytic reactions
Explanation:
I’m pretty sure it would be electrical, but since is not an answer the the best would probably be chemical, since heat isn’t able to charge a phone, you’re not using nuclear decay to charge a phone, and the charging cord is not radiating power to your phone
Second one is the correct answer
