How do the charges compare when two objects are charged through friction

Anybody wanna ? (picture included? )

Automobile fuel efficiency is often measured in miles that the car can be driven per gallon of fuel (mpg). heavier cars tend to have lower fuel efficiencies (lower mpg ratings). which variable (weight or fuel efficiency) is most naturally considered the explanatory (predictor) variable in this context?

Write a full page that sumerizes thermodynamics it’s from the website visionlearnig