The Physics
Opus in profectus

Sensible Heat

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  1. An 850 W consumer coffee maker can make 10 cups (1.75 liters) of 80 ℃ coffee from 20 ℃ 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 ℃). 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.


  1. An ordinary thermometer consits of 25 g of glass and 2 g of ethyl alcohol. If it has an initial temperature of 22 ℃, what temperature will it read when it is submerged in 100 g of 80 ℃ water?