Question

what does it mean in temperature of 20°c the surface energy of water is 7.27×10-²​

Answer 1

Answer:

Here, S=7.28×10

−2

Nm

−1

, P=.2.33×10

3

Pa

The drop will evaporate if the water pressure is greater than the vapour pressure P

As P=

R

2S

, where R is the radius of drop

∴R=

P

2S

=

2.33×10

3

2×7.28×10

−2

=6.25×10

−5

m