Question Detail

PHY 101 Surface Tension Objective Question

Question

Raindrops, oil drops, and falling drops of molten metal are all approximately spherical. What property of liquids is primarily responsible for this shape?
Options
A Viscosity
B Density
C Surface tension
Correct Answer
D Thermal expansion
Correct Answer

Option C is the correct answer.

Detailed Explanation

Surface tension causes the surface of a liquid to contract, minimizing its surface area. For a given volume, a sphere has the smallest possible surface area. Therefore, surface tension forces liquid drops into a spherical shape.

Hint

Think about which property of a liquid causes its surface to contract to the smallest possible area.

Question Info