Give signs used for floral formula.

In the circuit,if the forward voltage drop for the diode is $0.5\, V$,the current will be.......$mA$.

Which one is a wrong statement?

$A$ river of salty water is flowing with a velocity $2 ~m/s$. If the density of the water is $1.2 ~g/cc$,then the kinetic energy of each cubic metre of water is

$A$ body,thrown upwards with some velocity,reaches a maximum height of $50 \ m$. Another body with double the mass thrown up with double the initial velocity will reach a maximum height of $.......... \ m$.

Which of the following is an oxoacid?