WEEK 5 In an experiment to investigate Charles' law, a Physics student used a fixed mass of dry air trapped in a glass capillary tube as shown in the figure below. The student recorded in a tab how the length of the air column varied with temperature.

A 262 kg weather balloon is designed to lift a 1870 kg package. What volume should the balloon have after being inflated with helium in order that the total load can be lifted? (Assume standard temperature and pressure, at which the density of air is pair = 1.29 kg/m3 and the density of helium is PHe = 0.179 kg/m³.) %3D Submit Answer Tries 0/12 Post Discussion Send Feedback

An aquatic organism needs to be neutrally buoyant to stay at a constant depth. Fish accomplish this with an internal swim bladder they can fill with air that they take in from the water through their gills. One complication is that the pressure in the swim bladder matches that of the surrounding water, but the water pressure changes with depth. Because the volume of a gas is inversely proportional to pressure (as you may already know if you have studied the ideal-gas law), the volume of air in a fish's swim bladder decreases with depth unless the fish actively adds more air. ▼ Part A Consider a 3.9 kg freshwater fish whose tissues have an average density of 1050 kg/m³. To what volume in mL must the swim bladder be inflated for the fish to be neutrally buoyant at the surface? Express your answer in milliliters to two significant figures. AV = Submit VD] ΑΣΦ Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining ? mL

What is the cause of air pressure?   Why does the pressure a fluid exerts on the walls of its container decrease when the fluid starts to flow through the container (e.g. a piece of tubing)?   Why is it impossible to pull a fluid?   What does it mean to "entrain a fluid" into a flow?   When the gauge on a cylinder of gas reads zero, is the cylinder actually empty?  Explain.

Answer question a b and c, if possible

The intake in the figure has cross-sectional area of 0.79 m² and water flow at 0.48 m/s. At the outlet, distance D = 180 m below the intake, the cross-sectional area is smaller than at the intake and the water flows out at 9.1 m/s. What is the pressure difference between inlet and outlet? MPa Reservoir Generator building Intake Outlet→