Consider two interacting physical systems, A and B. Assume that the two systems are large so their temperature stays constant, but they can heat can still flow between them. System A transfers some energy as heat to system B. Neither system interacts with the environment. a. Does the entropy of system A increases or decrease as a result? Why?
b. Does the entropy of system B increases or decrease as a result? Why?
c. How do the magnitudes of the changes in entropy in (a) and (b) compare?
d. Explain how this process does or does not satisfy the 2nd law of thermodynamics?

A-4.60 μc charge is moving at a constant speed of 6.80×105 m/s in the +x−direction relative to a reference frame. at the instant when the point charge is at the origin, what is the magnetic-field vector it produces at the following points.

Imagine you had to physically add electrons, one at a time, to a previously neutral conductor. you add one electron very easily, but the second electron requires more work. in your initial post to the discussion, explain why this is. also, what happens to the work needed to add the third, fourth, fifth, and subsequent electrons

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.