MCQ
Work done in raising a box depends on
- AHow fast it is raised
- BThe strength of the man
- ✓The height by which it is raised
- DNone of the above
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where $x=$ displacement at time $t$
$\omega =$ frequency of oscillation
Which one of the following graphs shows correctly the variation $a$ with $t$ ?
Here $a=$ acceleration at time $t$
$T=$ time period

frequency $\Omega$ such that $\frac{4 \pi M \Omega}{ h }=10^{24} m ^{-2}$ with $h$ as Planck's constant. $N$ photons of wavelength $\lambda=8 \pi \times 10^{-6} m$ strike the mirror simultaneously at normal incidence such that the mirror gets displaced by $1 \mu m$. If the value of $N$ is $x \times 10^{12}$, then the value of $x$ is. . . . . . . .[Consider the spring as massless]