In order to cool a cup of hot tea, someone adds some cold milk and then waits 5 minutes. Would the tea have been cooler at the end of the 5-minute period if the person first waited 5 minutes and then added the cold milk? Assume that the temperature of the milk is the same whenever it is to be added.
1.No, the tea would be cooler after 5 minutes if the cold milk were added as soon as possible.
2.Yes, the tea would be cooler after 5 minutes if the cold milk were added at the end of the 5-minute period.
3.The final temperature of the tea would be the same in either case.
4.The one that would be cooler depends on the actual temperatures and amounts of the tea and the milk.
Question 2
Which curve would have the smallest slope? Assume no phase changes take place.
1.the temperature of water versus added energy
2.the temperature of ice versus added energy
3.the temperature of steam versus added energy
4.They would all have the same slope.
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Controlled cold compression unit.
Cold front
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