You wanted to design a doorbell system that was able to differentiate between the front door and the back door with a different sound, but the entire system was housed in the same unit. How would your design have to change in order to make that possible? Describe your new unit OR draw a detailed picture including labels for your new doorbell.

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.

Lightning is an example of what phenomenon? a release of a large amount of energy an absorption of a large amount of energy a natural electric circuit a natural electric current

How do you know how many valence electrons an atom has?