The hymen can be ruptured as a result of any sort of penetration:
No, the hymen isn't in the abdomen.
it is due to the rupture of the hymen
There is no way to tell them apart, although bleeding from hymen rupture may be very short and spotty.
In most cases yes the speculum or doctors fingers will either stretch the hymen right out of the way or in some cases rupture it.
No, menstrual clots can't rupture the hymen. Menstrual blood doesn't clot like normal blood, the larger pieces you see in menstrual flow is uterine lining. The hymen is tissue that surrounds the vaginal opening, the uterine tissue isn't even big enough to stretch the hymen let alone cause it to rupture.
The hymen is a very fragile structure and any number of activities can result in a rupture.
No, powerful water cannot rupture the hymen. Or at least not unless you were looking at a firehose strength stream of water being fired directly at someone's vaginal opening, and in that case there would be far bigger problems to worry about than a hymen tearing!
All penetration will rupture the hymen. Usually something the size of an erected penis will rupture the hymen if there is one there it can be ruptured by riding a bike.
There is no cherry in a vagina; there is a membrane called a hymen, and it may already be stretched or ruptured from normal activity long before the first time a girl has intercourse. Sometimes the hymen is sufficiently stretched that it allows for intercourse without any tearing at all.
The hymen isn't a solid barrier, it's more like a collar or inward flange. Some women never have much of one to start with. In theory, various forms of exercise can promote tears in this collar. Either way, the normal area where a bike saddle supports the body is quite a distance away from the hymen. So unless you have an accident, and land awkwardly on either the saddle or the neck of the handlebar, bicycling poses about as much risk to the hymen as taking big strides while walking.
There is no such thing as an unvirgin hymen the hymen is broken during intercourse.
Males do not have a hymen. Theoretically, you can say that the male's foreskin is their hymen equivalent, as it serves the same purpose for the penis as a hymen does for the vagina.