A container of water is heated to boiling point (100°C) and then placed in a room that has a constant temperature of 20°C. After five minutes the temperature of the water is 80°C.
- Use Newton’s law of cooling
, where is the temperature of the water at the time minutes after the water is placed in the room, to show that (2 marks)
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- Find the temperature of the water 10 minutes after it is placed in the room. (3 marks)
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