SUBJECT - PHYSICS
CLASS - 8th
PLEASE ANSWER THE FOLLOWING QUESTION :-----
SEE THE ABOVE PIC AND ANSWERE.
ANY GENIUS HELP ME.
DON'T GIVE ANY RUBBISH ANSWER.
THE ANSWER SHOULD BE OF 8th STANDARD
Answers
it is all due to adhesive and cohesive force...
answer : of 1st question -
when a very small amount of mercury is placed on a glass top it forms a spherical shape because the molecules have very strong force of cohesion among their molecules than with the glass molecules. the molecules near the edges are pulled inward. but the molecules can not move inward as their movement shall be opposed by the inner molecules. this creates a tension near the surface. this the molecules realign themselves them and in doing so the molecules reading them and take a spherical shape as a sphere takes the smallest surface area as compared to volume ratio.
ans of 2nd question -
when a small drop of water is placed on the glass top; it takes an oval shape as the molecules have strong force of adhesion with the glass surface that with the molecules of them.
hope it helps you.!!