PHY 1010 – Activity 10: Chapter 11 – Energy in Thermal Processes

For all problems, you must draw a diagram & show your work unless otherwise noted.

1. Convert the following from calories to joules or vice-versa.

a.

b.

c.

d.

e.

f.

2. What is the difference between the unit of Calories measured in the food you consume, and the unit of calories measured in the heat energy you produce as a result of this food you consumed?

3. Why does the insulation in your home help you in both the winter & the summer to keep warm & stay cool, respectively?

4. How does a thermometer measure the temperature of something (body, system, environment)?

5. Why do incandescent lights produce more heat than fluorescent lights? (Hint: Use Stefan’s law to explain your answer. Stefan-Boltzmann constant )