practice

1. An 850 W consumer coffee maker can make 10 cups (1.75 liters) of 80 °C coffee from 20 °C tapwater in 10 minutes. What percentage of the electrical energy consumed actually makes it to the coffee?
   
2. A 100 g cube of aluminum is removed from a bath of boiling water and dropped in a bath of room temperature water (2.00 liters at 20.0 °C). What is the final temperature of the water and zinc assuming heat loss to the surroundings is negligible?
   
3. Write something different.
4. Write something completely different.

conceptual

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numerical

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algebraic

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calculus

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statistical

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investigative

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worksheets

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