you can protect yourself from a bullet by diving underwater. If the shooter were directly overhead, you would probably be safe from most guns at 8 ft. At a 30 degree angle, you would only have to be 3 ft underwater to be safe.
up to 2m, the resistance is too high, the mass too little and the depending on the angle speed will go to zero very quickly.
Yes
When the salt dissolves in the water it raises the water's boiling temperature, so it stops boiling.
All the sun's rays penetrate water, but each color penetrates to a different depth. The colors at the upper end of the light spectrum, especially the UV (ultraviolet) that causes tanning, penetrate deepest. The UV portion of the sun's light can penetrate into clear water for a hundred feet or more at midday. The safest way to avoid overexposure is to remember that if you can see the sunlight, it may cause sunburn, and to limit exposure accordingly or perhaps wear a T-shirt or wet-suit.
we will run out of our supply of fresh water.
No
Only a few feet. Water slows and stops bullets rather effectively.
Water clarity is a measure of the amount of sunlight that can penetrate through the water
It penetrates water very well and soft tissues to variable degrees. It does not penetrate bone.
this depends on the particulates and chemical makeup of the water
a water molecule
Yes it can.
Fog is in essence tiny water particles. The light goes into a straight line as long as there are no objects colliding with it. However, water not only stops the light particles, it refracts them, causing the light to go in every direction except straight ahead.
Depends on the angle at which the bullet hits the water. At a shallow angle (less than 45 degrees) the bullet may bounce off the water, just as if it had hit a hard surface. At more direct angles, the bullet will splash, and may be deflected from a straight path. It will stop fairly quickly due to the resistance of the water.
Yes
deposition
When the salt dissolves in the water it raises the water's boiling temperature, so it stops boiling.
The colors that are the first to not penetrate are the warm colors like red, orange and yellow. Depending on the depth of the water, green, blue and lastly violet are the most likely to penetrate the bottom of a lake.