u blow up a balloon and release it, it flies around the room. What is happening to the air in the balloon and its volum

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

You were told not to stand so close to a rapidly moving train because you might get sucked under it. What do you think will likely happen to you?   Select one: The moving train could actually suck anybody closer to it. The moving train could be out of its way and will hit you. Greater pressure behind you will push you toward the moving train. Greater pressure between you and the train will pull you toward the train.

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.