Ball a is dropped from the top of a building and hits the ground in 10 seconds. another ball b is thrown straight down from the same building one second after dropping ball a. neglect air resistance and consider g - 9.8 m/s2 . what should be the initial velocity of ball b so that it hits the ground simultaneously with ball a: select one: o a. 9.8 m/s b. 20.6 m/s c. 4.3 m/s d. 10.3 m/s

Organelles are 1. responsible for producing power for the cell 2. tiny structures in the cell that carry out the cell's activities 3. responsible for digestion in the cell 4. found outside of the membrane

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

Click the game tab at the bottom of the simulation and select level 1. (there is no seesaw balance for this part of the activity.) balance the first equation, and click check to see if you got it right. if you can’t balance it in the first try, you can try again. work through the five equations for level 1. click continue to go on to level 2, and later level 3. each level is more difficult than the one before. keep trying until all the equations are balanced. in one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.