In which of the following is surface tension important?
In which of the following is surface tension important?
the floating of a ship in water
the floating of a dry needle in water
the floating of a baloon in air
the diffusion of sugar solution across a membrane
Correct answer is B
A carefully placed small needle can be made to float on the surface of water even though it is several times as dense as water. If the surface is agitated to break up the surface tension, then needle will quickly sink.
Which of the following factors does not affect the electric resistance of wire? ...
The strength of an electromagnet increases with ...
The force exerted on a charged body in an electric field depends on I. the charge on the body ...
The defect of the eye lens which occurs as a result of weak ciliary muscles is called ...
The maximum power transfer occur in a cell when the external resistance is ...