can you bring a flash light on board a plane?
Not under normal circumstances and why would you need to? Batteries are an issue - check before boarding.
Well, in the literal terms, you can physically bring fruit on a plane. But the real question is 'Can you bring fruit on a plane, and is it legal?' Well, that depends. If you buy fruit AFTER you have been checked, then yes you can legally bring fruit on a plane. Also, you can bring unpeeled fruit from "home" on the plane, but the already peeled or eaten food has to be wrapped.
Since airlines started selling the food on the plane, many people bring their own food on board. You can purchase food in the terminal after the security checks. Something like a salad might not get through TSA. It would have to be wrapped and salad dressing might be prohibited - and you would have to figure out how to keep it cold until you would want to eat it.
Yes, you can bring a bat to an airport. When you get there the security may stop you and ask you about it, but if you have a legitimate answer they will allow it. You can not bring the bat on the plane though, you must have the TSA put it under the plane for you when you go through security. You may bring it but it may not be accessible by anyone on the…
Yes, of course you can bring tampons on the plane. If you're menstruating then you likely need to use menstrual products - tampons, pads, cups, whatever - thus you need to be able to have menstrual products on the plane. You can buy menstrual products at the airport and there are even emergency pads in the plane bathroom. There's no reason what-so-ever for anyone to stop you from having menstrual supplies.