A steel needle floating on water, sinks when kerosine is ...
A steel needle floating on water, sinks when kerosine is added to the water. This is because the kerosine
increased the surface tension of the water
reduces the density of the water
reduces the surface tension of the water
reduces the upthrust on the needle
Correct answer is C
No explanation has been provided for this answer.
A body of volume 0.046m3 is immersed in a liquid of density 980kgm-3 with 34 of its vol...
A motor of a corn mill machine operates on electrical energy of 1.44×105J. If one-quar...
Which of the following devices does not makes use of eddy current for its action? A/An ...
Two cells each of e.m.f. 1.5V and an internal resistance 2Ω are connected in parallel. Calc...
The electricity meters in houses measure energy unit consumed in ...