Project 10: Learning Concepts
- Energy Conservation
- Thermal(Internal) Energy
- Specific Heat Capacity
- Thermal Equilibrium
Project 10: 5 Questions to test pre reading
- What is specific heat capacity? (What does it mean for it to be different for different materials?)
- What is meant by thermal equilibrium?
- How does thermal energy relate to energy conservation?
- Why is work and heat transfer different?
- What is the change in thermal energy of object equation?
Project 10: Part A: Post-Apocalypse Now
Henry Gupta has returned. It turns out he is a pretty bad dude. Gupta hid a remote communication device on the satellite that was activated. It launched many nuclear missiles across the world scorching most of the Earth.
100 years later…
You are a member of the Scorched Earth Army, an elite team of survivors responsible for the protection of and collection of resources for Quadrant 4.
Captain Benjamin L. Willard, Lieutenant Colonel Bill Kilgore, and your team have emerged from your underground bunker to find a deserted wasteland. Well, it's nearly deserted….
Your team is attacked by wild boar-tigers. While fighting them off, you manage to slay one of them and collect it for sustenance. Your team returns to the entrance of the bunker only to find it is locked and no one is answering the door.
Your team takes refuge near a fantastic oil fire. It's getting cold and you are hungry. Willard suggests you cook the beast using an age old technique: boiling water in a dirt pit. You'd like to avoid the carcinogens associated with cooking the beast directly over the oil fire. Your team finds a pile of hard and soft rocks near the oil fire. To properly cook the beast, you need to achieve a cooking temperature of 370K. Design the pit.
| Hard rock | Soft rock | |
|---|---|---|
| Density ($\times 10^{3}\,{\rm kg/m^{3}}$) | 2.67 | 2.2 |
| Specific Heat Capacity ($\times 10^{3}\,{\rm J/kg/K}$) | 1.0 | 1.4 |
Post-Solution Conceptual questions:
- What changes would you make to this model in order to make it more accurate?
- Describe the energy story for the problem, where does the energy transfer from one situation to another during the problem?