What is the unit of measurement for the time in the SI system?
A. Minute
B. Hour
C. Day
D. Second
Answer:D
What is the unit of measurement for the time in the SI system?
A. Minute B. Hour C. Day D. Second
Explanation: The second (s) is the unit of measurement for a time in the SI system. The duration of 9,192,631,770 periods of radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom is defined as one second.