Mechanical stopwatch can measure a time interval up to a minimum of __ seconds

🧠 Explanation:

Given: Minimum time interval a mechanical stopwatch can measure
Step 1: Mechanical dials are typically graduated into tenths of a second
Step 2: Least count = smallest scale division you can reliably read
Step 3: Standard graduation is 0.1 s per tick on common mechanical stopwatches
Check: Finer 0.01 s resolution is typical of digital/quartz, not mechanical
Final Answer: 0.1 second