The energy required to break one bond in $DNA$ is $10^{-20}\, J.$ This value in $eV$ is nearly
$0.006$
$6$
$0.6$
$0.0625$
A particle of mass $0.1 \,kg$ is subjected to a force which varies with distance as shown. If it starts its journey from rest at $x=0$, then its velocity at $x=12 \,m$ is .............. $m / s$
When kinetic energy of a body becomes $36$ times of its original value, the percentage increase in the momentum of the body will be :
Four particles given, have same momentum which has maximum kinetic energy
Two bodies of masses $m$ and $4 \,m$ are moving with equal $K.E.$ The ratio of their linear momentums is
An electron and a proton are detected in a cosmic ray experiment, the first with kinetic energy $10\; keV$, and the second with $100\; keV$. Which is faster, the electron or the proton? Obtain the ratio of their speeds. (electron mass $=9.11 \times 10^{31}\; kg$. proton mass $=1.67 \times 10^{-27}\;$$ kg , 1 \;eV =1.60 \times 10^{-19} \;J )$