Class 7th Sample paper Questions
NCERT Books Class 7 science Questions
NCERT based sample Questions
Class 7th Science Session 2021-2022
What is the standard unit for time period?
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Class 7th Sample paper Questions
NCERT Books Class 7 science Questions
NCERT based sample Questions
Class 7th Science Session 2021-2022
Standard unit for time period is second (s).