Help with thermodynamics basics? Due at midnight, please help! Small coffee cup

Question

Help with thermodynamics basics? Due at midnight, please help!

Small coffee cup heaters are placed in cups A and B and heat is transferred to keep the cups at the temperatures shown. The cups contain the same amount of water. Which answer best describes the rate that heat must be transferred to maintain the temperatures shown? Cup A in the previous question is placed outside where the temperature is 5 degreeC. Compare the rate at which heat must be transferred to keep the water at 45 degreeC outdoors to the rate required to keep the water at 45 degreeC inside the room. (Pick one of the choices A-H below.) When the cup is outside, more heat must be transferred at about five times the rate as inside at about twice the rate as inside at a slightly faster rate than inside Heat must be transferred at the same rate outside and inside When the cup is inside, more heat must be transferred at about five times the rate as outside at about twice the rate as outside at a slightly faster rate than outside None of the above answers is correct Three objects are kept outside for a long time on a cold day: a piece of cotton, a piece of wood and a piece of metal. Which object feels the coldest when you touch it? Which of the objects above would have the lowest temperature?

Explanation / Answer

10. B)

11. B)

12. C)

13 D)

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