Ava walked 3 blocks south, 5 blocks east, and then another 3 blocks south. Which diagram has the correct vectors for Ava's walk and her displacement ? Remember, the starting point of each part of the trip is the beginning of the arrow and the ending point is the pointed end of the arrow. (Sorry i couldn’t get all the answers in one picture, and won’t let you use more then one)

If gases like carbon dioxide and methane make up less than 1% of the total atmosphere, why is it important for scientists to monitor changes in percentages of these gases?

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?

Explain what will happen if decomposers were apsent from a forest ecoysystem.