That all depends whether you vomit the entire amount of food out or not.
No ; but you won't gain any. But I am sure that you know that it's very UNhealthy...
If you only drink water, and don't eat anything, there is no need to vomit(as you will only vomit out stomach acid), you will already lose weight, and probably be hospitalized sooner or later from problems arising from nutritional deficits.
You need to see a psychiatrist to be evaluated for an eating disorder.
you don't gain weight when you eat very little. you need to exercise and eat little portions of your meal and you will not gain weight, you will gain muscle by working out but not the weight.
Yes you do gain weight.
Yes, smoking can raise your heartrate but it is still possible to gain weight if you dont eat properly or excersise
Yes, if you eat only whole grain and/or whole wheat pastas. No, all pasta will cause weight gain if you have a predisposition to gain weight. Pasta, white or whole wheat, is very high in carbs.
dont eat
To gain weight you child has to eat good food.
To gain weight you have to eat more.
All of it.
How fast you eat has negligible effect on weight gain or loss.The important factor is what you eat and how much.