What action must happen in order for electrons to be transferred between two materials?

Rosa records the distance that a toy car rolls and the time it takes to cover the distance. what scientific practice is this? collecting data asking a question providing explanations communicating results

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?

Three resistance 4,4 and 6 ohms are joined in the series.the total resistance will be