Answer:
Metric ruler
Explanation:
You need to measure length, which is exactly what a ruler measures. The other option measure other things, like liquids or temperature.
The solution to the above question using the formula f=1/T where. T=0.5seconds is f=1/0.5= 2 hertz
Answer:
The answers would be likely be to a.) improve the environment and b.) cut costs.
Answer:
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