A net force of 40 N south acts on an object with a mass of 20 kg. What is the object's acceleration? (Hint: Use the formula a = 771

The answer which is not a detail carson used to describe the pool in the cave at low tide is b.  hundreds of periwinkles browse the branches and roots of the trees. 

In atoms, the electron carries a negative elementary or unit charge; the proton carries a positive charge. the two types of charge are equal and opposite. in an atom of matter, an electrical charge occurs whenever the number of protons in the nucleus differs from the number of electrons surrounding that nucleus.

D. a  bar magnet with its south pole on the left