Seminal plasma in human males is rich in

If work $W$ is done in blowing a bubble of radius $R$ from a soap solution,then the work done in blowing a bubble of radius $2R$ from the same solution is

Modern farmers have been able to increase rice production by $50\%$ using which of the following?

The figure shows a system of logic gates. From the study of the truth table,it can be found that to produce a high output $(1)$ at $R$,we must have

Two non-reactive monoatomic ideal gases have their atomic masses in the ratio $2 : 3$. The ratio of their partial pressures,when enclosed in a vessel kept at a constant temperature,is $4 : 3$. The ratio of their densities is :-

The pressure of $H_{2}$ required to make the potential of $H_{2}$ electrode zero in pure water at $298 \ K$ is