Think about all the different types of heat engines you might encounter in any given day. Think about how they operate and what their limitations might be. Assume that these heat engines operate at the Carnot efficiency. In your initial discussion post, respond to the following: List 10 different types of heat engines. Discuss what limits the efficiency of each. What changes to the device or to the environment would increase the efficiency

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?

Certain bacteria (such as aquaspirillum magnetotacticum) tend to swim toward the earth’s geographic north pole because they contain tiny particles, called magnetosomes, that are sensitive to a magnetic field. if a transmission line carrying 100 a is laid underwater, at what range of distances would the magnetic field from this line be great enough to interfere with the migration of these bacteria? (assume that a field less than 5% of the earth’s field would have little effect on the bacteria. take the earth’s field to be 5.0 * 10-5 t, and ignore the effects of the seawater.)

Name three populations commonly found in a prairie system