Sliding or rolling friction
Answer:
it holds reactant molecules in a good position for then to react
<span>answer is A : attracted to the negative terminal of the voltage source
I think, that the "hole"moves as it captures a free electron leaving another hole in a slightly different place. The electron leaving leaves a net + charge, which is attracted to the negative terminal. Because the "hole" behaves as a positive charge it is attracted towards the negative terminal.</span>
An example of erosion is the Grand Canyon, which was worn away over time by the Colorado river.
