Surface Tension & Capillarity

31. The angle of contact between a liquid and a solid surface is determined by:

a) Surface tension

b) Adhesion

c) Cohesion

d) All of the above

32. The shape of a liquid drop on a surface is determined by:

a) Surface tension

b) Adhesion

c) Cohesion

d) All of the above

33. The meniscus of water in a glass capillary tube is:

a) Convex

b) Concave

c) Flat

d) Depends on the diameter of the tube

34. The meniscus of mercury in a glass capillary tube is:

a) Convex

b) Concave

c) Flat

d) Depends on the diameter of the tube

35. The phenomenon of capillary rise is used in:

a) Plant roots

b) Blood vessels

c) Drinking straws

d) All of the above