According to Hooke's law of elasticity,if stress is increased,the ratio of stress to strain

The interval in which the function $f(x) = 2x^2 - \log x$,for $x > 0$ decreases,is

Which one of the following shows isogamy with non-flagellated gametes?

Let $PS$ be the median of the triangle with vertices $P(2, 2)$,$Q(6, -1)$,and $R(7, 3)$. The equation of the line passing through $(1, -1)$ and parallel to $PS$ is:

Water from a tap emerges vertically downwards with initial velocity $4 ~m/s$. The cross-sectional area of the tap is $A$. The flow is steady and pressure is constant throughout the stream of water. The distance $h$ vertically below the tap, where the cross-sectional area of the stream becomes $\frac{2}{3} A$, is $(g=10 ~m/s^2)$ (in $~m$)

Which of the following is absent in polluted water?