A | \(CO(g)+H_2 (g)\) | I | \(Mg(HCO_3 )_2+ Ca(HCO_3 )_2\) |
B | Temporary hardness of water | II | An electron deficient hydride |
C | \(B_2H_6\) | III | Synthesis gas |
D | \(H_2O_2\) | IV | Non-planar structure |
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 :