Which of the following is the best example of a thermodynamically open system?
a. a locked ice chest
b. a sealed glass jar
c. a swimming pool
d. a coffee thermos

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

Write down two additional questions about earth's magnetic field that will make your presentation more informative.

Apotter's wheel moves uniformly from rest to an angular speed of 0.20 rev/s in 32.0 s. (a) find its angular acceleration in radians per second per second. rad/s2 (b) would doubling the angular acceleration during the given period have doubled final angular speed?