How many molecules are present in 4.4 grams of CO\(_2\)?
(Molar mass of CO\(_2\) = 44 g/mol, Avogadro's number = \(6.022 \times 10^{23}\))
A bob of heavy mass \(m\) is suspended by a light string of length \(l\). The bob is given a horizontal velocity \(v_0\) as shown in figure. If the string gets slack at some point P making an angle \( \theta \) from the horizontal, the ratio of the speed \(v\) of the bob at point P to its initial speed \(v_0\) is :