Only visible rough surfaces have friction between them. true or false

In which research method does a researcher change the value of one variable to determine how the change affects another variable? a. experiment b. observational research c. survey d. case study

Look at the historical context sheet. how might settlers’ attitudes towards native americans have changed from the 1630s to the 1650s? how might settlers’ attitudes toward the land have changed from the 1630s to the 1650s? explain you answer. (4 points)

4) what articles do you think a soldier would have in his “old kit bag”?