Question

1. system variables can be observed and measured directly in a ___ scale. *

o a. time
o b. microscopic
o c. macroscopic
o d. mass

Explanation:

In thermodynamics and related fields, macroscopic scale allows direct observation and measurement of system - level variables like pressure, volume, and temperature. Microscopic scale deals with molecular and atomic - level phenomena which are not directly observable in the same way. Time and mass are individual variables, not scales for observing system variables.

Answer:

C. macroscopic