The answer is B for number 1 because rather than it being an observation it is something that you know for sure happened without guessing.
the answer is B the researcher is actually adding the fertilizer and measuring it.
Whitecap waves are caused by the wind, while swells are caused by surface gravity.
The answer you need is Volume.
The molecular formula shows the exact number of molecules. Therefor, the empirical formula is the simplest formula of the molecular formula
The Jetliner will travel a total of 1518 meters if flying for 6 hours.