Which of the diagrams shown in figure represents variation of total mechanical energy of a pendulum oscillating in water as function of time ?
A
B
C
D
Medium
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C
c $E = {E_0}{e^{ - \gamma t}}$
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Two simple harmonic waves having equal amplitudes of $8\,cm$ and equal frequency of $10\,Hz$ are moving along the same direction. The resultant amplitude is also $8\,cm$. The phase difference between the individual waves is $..................$ degree.
If $x, v$ and $a$ denote the displacement, the velocity and the acceleration of a particle executing simple harmonic motion of time period $T$, then, which of the following does not change with time?
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