1. Suppose a woman does 600 J of work and -9400 J of heat transfer occurs into the environment in the process. (a) What is the decrease in her internal energy, assuming no change in temperature or consumption of food? (That is, there is no other energy transfer.) J AE int (b) The internal energy is stored energy due to food intake. Treating the change in internal energy as the input energy and work done as output, what is her efficiency? Efficiency, Eff: (c) What physics law did you use in this problem? O Zeroth Law of Thermodynamics O First Law of Thermodynamics O Second Law of Thermodynamics
1. Suppose a woman does 600 J of work and -9400 J of heat transfer occurs into the environment in the process. (a) What is the decrease in her internal energy, assuming no change in temperature or consumption of food? (That is, there is no other energy transfer.) J AE int (b) The internal energy is stored energy due to food intake. Treating the change in internal energy as the input energy and work done as output, what is her efficiency? Efficiency, Eff: (c) What physics law did you use in this problem? O Zeroth Law of Thermodynamics O First Law of Thermodynamics O Second Law of Thermodynamics
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![# Thermodynamics Problem Set
1. Suppose a woman does 600 J of work and −9400 J of heat transfer occurs into the environment in the process.
**(a)** What is the decrease in her internal energy, assuming no change in temperature or consumption of food? (That is, there is no other energy transfer.)
\[
\Delta E_{int} = \_\_\_ \checkmark \_\_\_ \text{ J}
\]
**(b)** The internal energy is stored energy due to food intake. Treating the change in internal energy as the input energy and work done as output, what is her efficiency?
\[
Efficiency, \ Eff = \_\_\_\checkmark \_\_ \%
\]
**(c)** What physics law did you use in this problem?
- [ ] Zeroth Law of Thermodynamics
- [ ] First Law of Thermodynamics
- [ ] Second Law of Thermodynamics](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F0761ca0b-8a30-47ed-b77e-00687bf0302e%2F5f33b942-e0e9-4d04-a14b-3e0ed2e0f1ec%2Femw3zu8_processed.jpeg&w=3840&q=75)
Transcribed Image Text:# Thermodynamics Problem Set
1. Suppose a woman does 600 J of work and −9400 J of heat transfer occurs into the environment in the process.
**(a)** What is the decrease in her internal energy, assuming no change in temperature or consumption of food? (That is, there is no other energy transfer.)
\[
\Delta E_{int} = \_\_\_ \checkmark \_\_\_ \text{ J}
\]
**(b)** The internal energy is stored energy due to food intake. Treating the change in internal energy as the input energy and work done as output, what is her efficiency?
\[
Efficiency, \ Eff = \_\_\_\checkmark \_\_ \%
\]
**(c)** What physics law did you use in this problem?
- [ ] Zeroth Law of Thermodynamics
- [ ] First Law of Thermodynamics
- [ ] Second Law of Thermodynamics
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