Question

the difference in density between gases creates buoyancy, which is the ability of an object to float. At 0°C, helium has a density of 0.18kg/m 3. At 0°C, regular air has a density of 1.29 kg/m 3. In kilograms, how much mass can a cubic meter of helium float in regular air at 0°C?

Answer 1

Answer:

$\large \boxed{\text{1.11 kg}}$

Explanation:

The buoyant force in kilograms is given by

$F = V(\rho_{\text{air}} - \rho_{\text{He}})$

$\begin{array}{rcl}F& = & \text{1 m}^{3} \times(\text{1.29 kg/m}^{3} - \text{0.18 kg/m}^{3})\\ & = & \textbf{1.11 kg}\\\end{array}\\\text{A cubic metre of helium can float a mass of \large \boxed{\textbf{1.11 kg}} }$