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17 May, 18:23

For a scientific experiment a physicist must make sure that the temperature of a metal 0°Cgets no colder than - 80°C. The physicist changes the metals temperature at a steady rate of - 4°C per hour. For how long can the physicist change the temperature?

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  1. 17 May, 18:25
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    80/4=20 so he can change the temperature for 20 hours
  2. 17 May, 18:34
    0
    think and you will succeed
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