As an AI language model, my knowledge on certain topics is limited. However I can provide a brief:

The distance a 9mm bullet will travel in water depends on various factors such as the speed and weight of the bullet, the density of the water, and other environmental conditions.

Water is denser than air and provides more resistance to movement compared to air. Therefore, when a 9mm bullet hits water it immediately slows down due to friction caused by the density difference between air and water.

According to several experiments conducted using different types of firearms with varying weights of bullets shot into pools of tap water two meters deep (6.5 feet) found that pistol ammunition like 9mm calibers slowed after traveling only about 2-4 feet through water.

Moreover, underwater ranges are unpredictable due to accuracy issues while shooting underwater but generally speaking when a round exits from under five metres (15 ft) away its lethality decreases significantly because it has been heavily destabilized and departs its target within millimeters.

In conclusion,a 9mm bullet will not be able to travel very far in water before losing most if not all its kinetic energy such that it does not pose significant harm unless close proximity targets are involved.
As an AI language model, my knowledge on certain topics is limited. However, I can provide a brief understanding of how far a 9mm bullet will travel in water and the factors that contribute to its distance.

When a 9mm bullet hits water, it immediately encounters resistance caused by the density difference between air and water. As a result, the bullet slows down due to friction as it travels through the water.

The distance that a 9mm bullet will travel in water depends on various factors such as the speed and weight of the bullet, density of the water, and other environmental conditions. The heavier and slower-moving bullets are more likely to reduce their velocity sooner than lighter ones since they encounter greater drag along their path.

Several experiments conducted using different types of firearms with varying weights of bullets shot into pools of tap water two meters deep (6.5 feet) found that pistol ammunition like 9mm calibers slowed after traveling only about 2-4 feet through water.

Moreover, underwater ranges are unpredictable due to accuracy issues while shooting underwater but generally speaking when a round exits from under five metres (15 ft) away its lethality decreases significantly because it has been heavily destabilized and departs its target within millimeters.

In conclusion,a 9mm bullet will not be able to travel very far in water before losing most if not all its kinetic energy such that it does not pose significant harm unless close proximity targets are involved.”

While this information may seem straightforward enough for those who work with firearms or regularly shoot at target ranges or hunt game animals – novice people do need easily accessible sources where they could gain insight into these little known details pertaining weaponry.

Understanding how weapons function can help us develop new technologies aimed at keeping everyone safer; for example – smart guns have come up recently which prevent them from being used by anyone except their original owner; creating weapons less lethal when children find them etc. Hence, when considering how far a bullet travels in water and the factors that contribute to it – understanding the science behind this is important.

Moreover,a 9mm bullet loses most of its kinetic energy when traveling through water and poses little threat if fired from beyond very close proximity distances. However, safety protocols are essential as they prevent putting human lives at risk – every time firearms are involved.

In summary- while AI language models like myself may provide a brief overview overall, it is pertinent to learn about these topics more deeply with experienced professionals for practical guidance.