Is it Calcium carbonate which neutralizes the acid.
No your stomach will not explode if you eat right before swiming, however your stomach will cramp and more then likely you won't be able to swim. Wouldn't recomend it, my parents always told us kids not to eat right before swimming.
This is very likely a reaction to shaving. Changing to a milder shaving soap, a better shaving system and thourough rinsing before and after will reduce this reaction. A skin conditioner applied after shaving will also help. Shaving in the direction of the hair not against it will reduce the damage to the surrounding skin.
Oesophagus and Stomach
Water for one. If a reaction is diluted, the components of the reaction are less likely to contact one another. This will mean that they will be also less likely to continue a reaction.
The problem with swimming before you eat is because of stomach cramps. After a meal, any physical activity can lead to these cramps, and when your swimming you may not be able to swim with the cramps which in some cases could cause you to drown. It's not very likely, but it can happen.
You are likely to be punched in the stomach if you just had a large meal, such as Thanksgiving.
Oesophagus and Stomach
You are likely just nervous, but this can also be a symptom of something else. IBS often presents this way, especially if you have stomach problems after eating, as well.
Most likely it is gasses from your digestive system. Try not eating before bed to cease the kicks.
A small piece has more surface area compared to its mass; as a result, more neutrons will escape before they can participate in the chain reaction.
Its most likely your stomach trying to digest something or food it doesn't agree with
It's very likely gas, actually.