When you walk past an open door of a room in your house in
When you walk past an open door of a room in your house in which a person is speaking, you can hear the person long before you can see him. Why? What does this tell you about the wavelengths of light and sound?
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part a-power lines carry electricity at about 120000 volts if a power line were stepped down by a transformer to 120
when you walk past an open door of a room in your house in which a person is speaking you can hear the person long
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