4(ii) State two precautions taken to ensure accurate result. 4(iii) If smooth spherical ball of brass material having a radius of 3mm fall through certain
liquid having coefficient of viscosity of 8x 10-NS/m². If the density of the brass
material is 8.6x10 kg/m", estimate its terminal velocity
(v)? Assume that the density of the liquid is 5.7x10kg/m.​

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i.e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.

Carbon 14 is a naturally occurring stable

Aspring has a natural length of 8 m. if a 12-n force is required to keep it stretched to a length of 10 m, how much work w is required to stretch it from 8 m to 16 m? (round your answer to two decimal places.)