11is it c ??
For CONCAVE minuscus adhesive force>cohesive
For CONVX minuscus adhesive< cohesive
For plane (neither concave nor convx angle of contact =90°) :
a) adhesive<cohesive
b) adhesive>cohesive
c) adhesive=cohesive
??????
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8 Answers
1for concave angle of contact is less than 90°and for convex angle of contact is greater than 90°.
for a 90° angle of contact adhesive force must be equal to cohesive to cancel out each others effect, since midway of obtuse and acute is 90 hence midway of adhesive > cohesive and cohesive > adhesive must be adhesive = cohesive which correspomds to 90° angle
so i thnk the answer shuld be (c)..
DID UR TEACHER GIVE ANY EXPLANATION FOR HIS ANSWER.[7]
