What is the velocity of an object that moves from x-2m to x=6m in 14 second?

How can one distinguish breccia from conglomerate? a. breccia contains angular clasts and conglomerate contains rounded clasts. b. breccia contains rounded clasts and conglomerate contains angular clasts. c. different minerals cement breccia than cement conglomerate. d. breccia contains sand and conglomerate contains silt.

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When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.