The gauge pressure of a balloon 25m under the sea would depend on the depth at which it is submerged. However, assuming standard seawater density of approximately 1025 kg/m^3, the gauge pressure would be approximately 2.4 atm or 240 kPa.
The gauge pressure of a balloon will increase as it descends deeper under the sea due to the weight of the water above it. For every 10 meters of depth, the gauge pressure will increase by approximately 1 atm or 100 kPa.
No, the gauge pressure of a balloon 25m under the sea cannot be negative. The gauge pressure is always positive and represents the difference between the internal pressure of the balloon and the external pressure of the water.
The gauge pressure of a balloon at 25m under the sea would be approximately 2.4 atm, which is significantly higher than the atmospheric pressure at sea level which is approximately 1 atm. This is because the balloon is being subjected to the weight of the water above it in addition to the atmospheric pressure.
The gauge pressure of a balloon at 25m under the sea can be affected by the depth at which it is submerged, the density of the seawater, and the internal pressure of the balloon. Other factors such as temperature, salinity, and the shape and size of the balloon can also play a role in determining the gauge pressure.