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Question:

please help! easy 10 points! 8th grade science help!?

*please please help me and i will be forever grateful, here are the questions1. Why do road crews salt the streets before a severe snow or ice storm? Is it better to slat before or after the snow/ice is on the road? why?2. discuss the facts that lakes and rivers freeze, but oceans and seas, which are 0.09% NaCi, do not freeze as easily3. Using salt on the orad is not accepted in many commmunities. What are some drawbacks to using salt on the roads?Please Please help! 10 points! Plus, a very personal thank you if you include your email address!

Answer:

The answer is that electrons do not pass thru the dielectric in either AC nor DC. If you apply a DC voltage to a capacitor, one plate will lose electrons, and they'll move to the other side. This current flow will stop as soon as the capacitor is fully charged. If you apply an AC voltage to a capacitor, one plate will lose electrons, and they'll move to the other plate during the first half of the cycle. Then, as the applied voltage reverses, the electrons flow out of the second plate, and back to the first. Over the course of time, the electrons just keep flowing from one plate to the other and back again, not through the dielectric, but through the outside circuit. If you place an ammeter in the circuit, you'll see the flow of current alternately charging the two plates of the capacitor. So, it behaves in the circuit as though the AC current is going through the dielectric, but the electrons do not physically penetrate it. .
should be good. check with your racetrack for the requirements first. i personally would by an impact suit which is $500 and impact shoes and gloves which will be about another $200 dollars. impact suits are alot nicer quality and look better if ya ask me.
Unless your driveway, mailbox or fire hydrant is being blocked, you can do nothing, nor should you be able to. Your neighbors are tryin' to make some extra money and the streets are public areas. Be a bit more tolerant, suppose it was you that was having customers over to make a few bucks. Keep solid with the fundamental concept of freedom and don't try to dictate to others what can or can't be on the public street in front of your house. Stick to the basic fundamentals of freedom and you'll be on the right side.

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