-identifies an electric charge
-it can identify its polarity (positive or negative) if you compare it to a charge that you already know
-can identify the magnitude of a charge (how big of a charge it is)
The red end of the visible spectrum has the longer wavelength while the blue end of the visible spectrum has the higher frequency.
We don't know how many of ANY color are in the bag right now, so there's no way to calculate an answer.
What Tom has to do is make sure that the number of marbles that are NOT blue is NINE TIMES the number of blue ones in the bag.
Answer:
b
Explanation:
emphasizes self-importance
