Question

the diagram is being used to illustrate the second law of thermodynamics, where qh represents a hot object and qc represents a cold object. which will best complete the diagram to illustrate the law? adding in the boxes an arrow that points from qh to qc adding in the boxes an arrow that points from qc to qh adding in the boxes an arrow that points in both directions between qh and qc adding in each box an arrow that points upward from qh and from qc

Explanation:

Step1: Recall heat - transfer principle

Heat naturally flows from hot to cold.

Step2: Analyze the second - law of thermodynamics

The second law of thermodynamics is related to the direction of heat transfer. Heat transfer occurs spontaneously from a high - temperature object ($Q_h$) to a low - temperature object ($Q_c$), not the other way around without external work being done. So an arrow from $Q_h$ to $Q_c$ best illustrates the law.

Answer:

A. adding in the boxes an arrow that points from $Q_h$ to $Q_c$