Để làm một biến trở có điện trở lớn nhất là 20Ω bằng dây dẫn nikêlin có điện trở suất là 0,40.10-⁶Ω.m và tiết diện 0,5mm². Tính chiều dài của dây dẫn

yup its correct its: c) b b

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.