Choose the odd-one out.

38) Large Reynolds number is an indication of

39) As per Avogadro's law, volume of 1 k mol of any gas is _____ cubic meter at N.T.P.

40) Efficiency of induction motors can be about

41) A weight of 200N is to be pulled over a surface with coefficient of friction 0.2. What is the force needed to start motion?