A meter ruler or a tape measure
You don't measure with length. You measure the length of an object with a ruler. You would use inches or metres as your units.
You would measure the distance of the door with meters because liters measure volume not length.
centimeter
ruler
millimeters
It would turn yellow.
You don't measure with length. You measure the length of an object with a ruler. You would use inches or metres as your units.
Insects, screws and nails, tubing are some examples.
The cup will remain orange if you put iki in it, and the tube will turn darkish blue or you can call it black.
Osmosis is usually detected by simply looking at the experiment - most of the time, enough water is transferred to cause a noticeable rise/fall in water levels. However, I assume you could tell through the usage of weighing scales - as water re-distributes, as would the weight.
I would measure it with a ruler.
Any measure of length will do, but the most common would be feet or meters.
You would answer it with cubic feet
length
A metres, for an approximate measure, a centimetre for a more accurate measure.
I would use feet
You would use meters.