The mucous membrane in your nasal passages have a specific pH (acid vs. base) level. When you get water up your nose, the water is slightly acidic or alkaline (depending on where you live) and that can irritate the mucous membrane due to the interaction between the mucous and the water. If you wait a few minutes, it should go back to normal.
Because of the pressure on your sinuses. It's kind I like when you need to even out the pressure on your ear drums when you Scuba dive.
their is no air in the water
uhmmm... it depends on how high you are jumping from and whether or not u are jumping into a pool or just landing on a hard surface. YES, i think you could die from a belly flop. im not quite sure if your asking jumping into a pool and belly flopping or what but if you were from a high enough place i bet u could die. i wouldn't completely trust me though im not an expert on belly flopping
BEND YOUR KNEES PUT YOUR HANDS UP AND JUMP HEAD FIRST INTO THE POOL
No, Just do NOT be hard on your body. Do NOT pick up anything more heavy then a gallon of milk!
No reason not too. I am not sure I would dive off the high dive and do a belly flop, but swimming is good for you.
Not hurt the pool but it can inhibit chlorine from sanitizing properly in high amounts. If its to high just drain some water out and refill with fresh.
This answer depends on which move you use.Water has a thin layer of a substance that can only be described as a 'skin.' This, is what makes objects such as water bugs or leaves float.When diving into a pool or a lake or what ever else you can dive into, you're breaking the skin of the water. The more surface you apply to the water, the more it will potentially hurt.For instance, a cannon ball where you're all curled up and only your rear end breaks the surface of the water, it doesn't hurt so much. A belly flop, with your arms out stretched and your whole body hit the surface, is going to hurt much more.Also, the part of your body that hits, because some parts are tougher than others, and how much force you have when hitting the water, also effects how much it's going to hurt.I hope this is what you were looking for.
you cant
This depends on what kind of pool you have. If it's a permanent pool, such as one set in concrete, no that will not hurt it. If it is an inflatable pool, than yes, leaving it outside when it is not full could eventually cause damage.
No
Just the weeds. My husband has been spraying it around our pool for years and we've had no problems.
NO! The chemicals in the pool will hurt them, not to mention it's MUCH too cold! Let them swim in a shallow bath tub filled with warm (not hot) water.