Correct answer
D. all of the above
Explanation
The correct answer is all of the above.
The upper surface of a weir over which water flows is known is________?
If some links are connected such that motion between them can take place in more than one direction, it is called________?
The value of mass density in kgsecVm4 for water at 0°C is________?
Thermal conductivity of glass-wool varies from sample to sample because of variation in ________?
The part load efficiency of a carburettor is,________?
A square surface 3 m x 3 m lies in a vertical line in water pipe its upper edge at water surface. The hydrostatic force on square surface is________?