Recent content by lisamay44

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    Metal in Microwaves: Glass or Metal?

    A compact disc contains an extremely thin sheet of aluminum. If you put a larger block of metal in a microwave oven along with a CD and turn the oven on, a) nothing significant happens b) only the metal will spark and then melt c) the metal will melt and the CD will spark d) only the CD...
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    What Direction Does the Magnetic Field Oscillate in a Vertically Traveling Wave?

    If an electric field wave oscillates north and south, and the wave is traveling straight up, then what direction does the magnetic field wave oscillate? east and west north and south up and down It does not oscillate; this situation is impossible. I know that magnetic...
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    Battery Operation: How Charges Move Inside a Closed Circuit

    Well the law of conservation of charge states that charge cannot be created or destroyed in an isolated system, only transferred. So that rules out A and C. So then in a closed circuit, the positive charges move outside the battery from the positive terminal, through the load, to the negative...
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    Battery Operation: How Charges Move Inside a Closed Circuit

    Inside the battery (we stress INSIDE the battery) in a closed circuit (consider the battery attached to a lightbulb with the light bulb glowing), the battery (a) creates positive charge. (b) pumps positive charge from its positive terminal to its negative terminal. (c) creates...
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    Static Electricity: Reduce Shock by Holding a Doorknob

    I'm just confused because even if she rubs her feet on the carpet, there is no guarantee that she will charge herself to the same potential as you. On a related note, when you ground yourself you produce an electric shock? Does this occur because you are transferring a charge back to the earth?
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    Static Electricity: Reduce Shock by Holding a Doorknob

    You rub your feet on the carpet in your warm living room on a cold winter day. You know you have gained static electrical charge on your body. You decide to touch your sister to shock her. Your sister knows that in order to reduce the electrical shock she will feel when you touch her, she...
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    High School Static Electricity: Reduce Shock by Holding a Doorknob

    You rub your feet on the carpet in your warm living room on a cold winter day. You know you have gained static electrical charge on your body. You decide to touch your sister to shock her. Your sister knows that in order to reduce the electrical shock she will feel when you touch her, she...