In a simple pendulum experiment, if the bob is given a small angular displacement theta, the restoring force is proportional to: -

In the Stokes' method for finding viscosity, a steel ball reaches terminal velocity when: -

A calorimeter containing 100 g of water at 20 deg C receives 50 g of water at 80 deg C. Neglecting heat loss, the equilibrium temperature is: -

In the cooling curve experiment (Newton's law of cooling), the rate of cooling is proportional to: -

In Searle's apparatus, a wire of length 2 m and diameter 0.5 mm is loaded with 2 kg. The extension is 0.4 mm. Young's modulus is approximately: -