Q1. An 1100 {rm kg} wrecking ball hangs from a 15 {rm m}-long cable. The ball is pulled back until the cable makes an angle of 17.0^circ with the vertical.

Q2. Large quantities of nitrate (a mobile aninon) and an industrial solvent with a distribution coefficient of Kd =0.4 cm3/g were spilled on the soil surface. Meteorological data shows that annual rainfall and evaporation are 1000 mm and 550 mm, correspondingly. There is a water table at 60m below ground surface. Assume that the soil has an average water content of 2.5 kg/kg and a bulk density of 1500 kg/m3. Approximate the position of both peaks 30 years after they were spilled. Estimate the expected future arrival time of both peaks at the water table.