If you can help, please do. I have D- in this class and i need it to a C- ( this is the last assignment). Friction occurs because the microscopic
of two touching surfaces stick to each other.
A. tunnels and rivers
B. hills and valleys
C. hills and rivers

What is the standard unit of measure for acceleration?

The diagram below shows a cell placed in a solution. a cell is shown placed inside a beaker. it is labeled cell. the solution inside the beaker is labeled 40% salt solution and the solution inside the cell is labeled 20% salt solution. only water is allowed to move in and out of the cell. what will most likely happen to the cell? it will expand as water moves out of it. it will shrink as water moves out of it. it will expand as water moves into it. it will shrink as water moves into it.

Ascientist conducted an experiment and discovered that certain plants grow faster when given a particular amount of fertilizer. anouther scientist conducted the same experiment and got similar results. which concept does this best illustrate? a) repetition b) replication c) precision d) validity