Final answer:
The unit of measurement for time in this scenario is seconds, which is the SI unit for time. Conversions are necessary when mixed units are present to standardize measurements for calculations.
Step-by-step explanation:
In this scenario, the correct unit of measurement used to report time is seconds. Seconds are the SI unit for time measurement, commonly used in both everyday situations and scientific contexts. When dealing with mixed units that involve both hours and seconds, as mentioned under the context of Physical Quantities and Units, it is necessary to convert all time measurements to seconds to maintain consistency and facilitate calculations.
For example, converting hours into seconds involves multiplying the number of hours by 3600, the number of seconds in an hour. This ensures that any computation involving time is done using a single, standard unit. Similarly, when subtracting or adding different time measures, such as converting 120 seconds into minutes, you would divide by 60, since there are 60 seconds in a minute.