An object fails under a shear force of 16 N distributed over a lap area of 4 m2. Calculate its Average Shear Stress (ASS) in N/m2.

A coal sample contains 5% hydrogen by mass. The gross calorific value (GCV) of the coal is 30 MJ/kg. The net calorific value (NCV) will be closest to: (Assume latent heat of vaporization of water = 2.45 MJ/kg)

An enzyme following the Michaelis-Menten equation catalyzes the reaction A → B. When the enzyme concentration is 15 nM and substrate concentration is 10 μM, the reaction velocity is 5 μMs-1. If Km for substrate A is 5 μM, the kinetic efficiency (Kcat/Km) of the enzyme in M-1s-1 is: