Part F For both Tracker experiments, calculate the average vertical acceleration, where the time period is t = 0.10 second tot = 1.00 second. Consider
only the magnitude of the vertical velocity in the calculations. Record your results to three significant figures.
Comment: How does the average acceleration of the two balls compare to the theoretical value of -9.81 meters/second, and how do the
accelerations of the two balls compare to each other?

A., d., and f i think

Gas will most likely  fill the container 

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current