Question

____ is a device used for measuring in one second

Answer 1

Stop watch


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Answer 2

Measurement of time has been done by various instruments throughout history such as sundials followed by the discovery of clocks.

Currently one second or accurate small divisions of time are measured with the help of atomic clocks for scientific purposes where very small measurements of time are required.

For day to day practical purposes, stopwatches can be used to measure one second.