1. In a liquid of density ρ, what is the net fluid force on a submerged sphere (e.g., a ball or a balloon)? What is the direction of the force and how does the magnitude of the fluid force vary with...

1. In a liquid of density ρ, what is the net fluid force on a submerged sphere (e.g., a ball or a balloon)? What is the direction of the force and how does the magnitude of the fluid force vary with fluid density?

2. What is the effect of gravity on the pressure distribution in a compressible fluid such as air in Earth’s atmosphere?