answer and $0\mathrm{.}2$ points off for every incorrect choice. Picking all answers will result in a zero score.

The kinks in the hose may introduce non$-$laminar flow which will most likely result in the increase of the time over what I calculated.

The motion of the fluid is not actually in $2$D: it would have to travel a bit from side to side which would make the time longer. water flow. This effect will increase the calculated time.

in the trough. If one empties the hose before dipping it back into the trough, the initial "suction" may not even begin and the trough will not empty at all.

pressure will reduce as the trough empties so the overall effect may be small.

the hose.