Lauren was investigating how fast it took Robert to react to different sounds. What would be the dependent variable in this experiment

Agas is contained in a thick walled balloon when the pressure changes from 1.21 atm to 2.52 the volume changes from 3.75 l to 1.72 l and the temperature change from 293k to blank k

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

What method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots