A hot air balloon has a volume of 1.2 m³ and a fabric mass of 0.3 kg. If the density of air is 1.25 kg/m³ and the density of helium is 0.018 kg/m³, calculate the maximum tension on the string.

ii) I cannot determine the average relative density of the spirit as the necessary information (such as its density, mass, or volume) is not provided in the visible part of the question. This question likely refers to data from a preceding section.

c)
Given:
Volume of balloon, $V = 1.2 \text{ m}^3$
Mass of fabric, $m_{fabric} = 0.3 \text{ kg}$
Density of air, $\rho_{air} = 1.25 \text{ kg/m}^3$
Density of helium, $\rho_{helium} = 0.018 \text{ kg/m}^3$
Acceleration due to gravity, $g = 9.8 \text{ m/s}^2$ (assumed standard value)

The maximum tension on the string occurs when the balloon is fully inflated and the net upward force (buoyant force) is balanced by the total downward forces (weight of helium, weight of fabric, and tension in the string).