Explain why
Water with detergent dissolved in it should have small angles of contact.

What is the angle of contact?

A fuse wire should have high melting point.

When the temperature is increased the angle ofs contact of a liquid

Capillary is dipped vertically in a liquid. The level in the capillary will be same as outside the capillary if the angle of contact is :

A carrier wave of peak voltage 8 v is used to transmit a message signal. What should be the peak voltage of the modulating signal in order to have a modulation index of 80%?