A very lightweight horizontal loop of wire is suspended from a fine spring, lowered into water, and then raised to the surface. Any further attempt to raise it causes the spring to
A) stretch.
B) contract.
C) stay the same.
Question 2
Surface tension of liquids
A) increases when wetting agents are added.
B) decreases as the liquid temperature increases.
C) is about the same for all liquids.
D) results from a thin molecular membrane beneath the liquid surface.
E) keeps steel ships afloat.
