Question

5. What must be the minimum volume of a helium balloon for it to be neutrally buoyant in air. The density of air is 1.29 kg/m^3​3​​, the density of helium is 0.17 kg/m^3​3​​. The total mass of the helium balloon is the helium it holds as well as a 2.90 g rubber skin. You may ignore the tiny volume of the rubber skin.

6. The drip chamber of an IV bag is designed to regulate how quickly a drug is infused into a patient. Assuming the top of the chamber is sealed to prevent room air from entering, what is the pressure 3.42 cm from the bottom of a 10 cm drip chamber? The infusion has a density of 1 g/cm^3​3​​.

Answer 1