energy/unit area
distance
both of the above
it has no units
Answer is Wrong!
Answer is Right!
The correct answer is A. energy/unit area.
Surface tension is the tendency of a liquid surface to shrink into the smallest possible area. It is caused by the cohesive forces between the molecules of the liquid. The units of surface tension are newtons per meter (N/m).
Option B is incorrect because distance is not a unit of surface tension.
Option C is incorrect because surface tension is not both energy/unit area and distance. It is only energy/unit area.
Option D is incorrect because surface tension does have units. The units of surface tension are newtons per meter (N/m).