In Simple Harmonic Motion, recall that acceleration is maximum at the extreme points and velocity is maximum at the mean position.
In SHM, the restoring force is proportional to the displacement, which makes statement (A) correct. Statement (B) is also correct since in SHM, the displacement and acceleration are indeed opposite. Statement (C) is true, as the velocity reaches its maximum when the particle passes through the mean position. However, statement (D) is incorrect because the acceleration is actually maximum at the extreme points, not minimum.
A black body is at a temperature of 2880 K. The energy of radiation emitted by this body with wavelength between 499 nm and 500 nm is U1, between 999 nm and 1000 nm is U2 and between 1499 nm and 1500 nm is U3. The Wien's constant, b = 2.88×106 nm-K. Then,

What will be the equilibrium constant of the given reaction carried out in a \(5 \,L\) vessel and having equilibrium amounts of \(A_2\) and \(A\) as \(0.5\) mole and \(2 \times 10^{-6}\) mole respectively?
The reaction : \(A_2 \rightleftharpoons 2A\)