During a race, a runner runs at a speed of 4 m/s. 4 seconds later she is running at a speed of 8 m/s. What is the runner's acceleration?

Asolution of sodium hydroxide was titrated against a solution of sulfuric acid. how many moles of sodium hydroxide would react with 1 mole of sulfuric acid?

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

Which change to the system wood cause the freely-moving piston to lower?