The bob of a simple pendulum executes simple harmonic motion in wat...

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The bob of a simple pendulum executes simple harmonic motion in water with a period t, while the period of oscillation of the bob is \( \mathrm{t}_{0} \) in air. Neglecting frictional force of water and given that the density of the bob is \( (4 / 3) \times 1000 \mathrm{~kg} / \mathrm{m}^{3} \). What relationship between \( t \) and \( t_{0} \) is true
(a) \( t=2 t_{0} \)
(b) \( \mathrm{t}=\mathrm{t}_{0} / 2 \)
(c) \( \mathrm{t}=\mathrm{t}_{0} \)
(d) \( \mathrm{t}=4 \mathrm{t}_{0} \)
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