You have a rubber balloon with a string attached to it, and a weight attached to the other end of the string. You put just the right amount of air in the balloon such that if you submerge the balloon and weight under water to a depth of 30 feet, the balloon will not rise or sink (its buoyancy force is exactly balanced by gravity).

You then pull the balloon and weight down another 30 feet. If you let the balloon go at this depth, will it rise or sink?
Assume that the water temperature is the same at both depths.

I would say sink, because the gravity and pressure is stronger the deeper the balloon goes

It'll rise, as long as its still filled with hot air.

@Joshua198924: The gravity wouldn't change. Gravity remains constant, despite depth of water.

@Hawkeye58: oh, I am not that good at physics lol

@Hawkeye58: So the balloon itself is at a depth of 30 ft to start with?

Nevermind, doesnt matter....balloon goes 30 ft deeper.....water pressure pushes in on it....balloon sinks

@Hawkeye58: does it just stay in place after its pulled down?