6. A family decided to take a trip to Europe. The plane they took flew at an average speed of 500 miles per hour during the flight. The plane covered a distance of 5,000 miles during the flight. How long was the flight?
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the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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the answer is 0.42 is that is an option. this question provides no info