Express in $kg:-$

$4875g$

Q. The sun radiates energy at the rate of $3.6\times {10}^{26}{\text{Js}}^{-1}$. The rate of decrease in mass of sun is $\left({\text{in kgs}}^{-1}\right)$

Q. A solid cylinder of mass $20Kg$ has length $1m$ and radius $0.2m$. Then its moment of inertia $(inkg-m^2)$ about its geometrical axis is-

Q. A solid cube floats in water half immersed and has small vertical oscillations of time period $\frac{\pi }{5}\text{s}$. Its mass $\left(\text{in kg}\right)$ is:
$(\text{Take}g=10{\text{ms}}^{-2})$

Q. Construct a frequency distribution table for the data on weights $\left(inkg\right)$ of $19$ students of a class using intervals $30-35,35-40$ and so on. $39,38,47,44,42,65,49,55,49,36,34,46,31,53,60,48,33,38,40$. Also, draw histrogram for the above data

Q. A particle of mass $1\text{kg}$ suffers one - dimensional elastic collision with an unknown mass at rest. It rebounds directly backward by losing $64\%$ of its initial kinetic energy. The unknown mass $\left(\text{in kg}\right)$ is