It is completely permissible to send a query to many outlets at the same time. If more than one press expresses interest, the author should research and rate the presses. Only one press should get the whole book proposal. If it rejects the project, the proposal may be sent to another company.
Often authors believe they can't afford to publish with more than one company because they don't want to risk losing out on money. But this is not a valid reason to limit yourself to only working with one publisher. If you are able to produce a quality manuscript that stands out from the rest, then there's no reason why you shouldn't be able to secure contracts with several publishers at once. And even if you can't come up with something unique enough to make more than one publisher want to take you on, most companies will be willing to work with you on a multi-contract basis. The only real way to avoid publishing with more than one company is if you find a partner who will take all of them from you. But since most partnerships are based on mutual benefit, this seems like a risky strategy to me.
The main reason people say they cannot afford to have contracts with more than one publisher at a time is because they fear being left without payment if one company turns down their project.
Please keep in mind that submitting the same article to more than one journal at the same time is regarded extremely unethical. Almost all well-indexed journals do not normally examine articles that are under consideration elsewhere. Multiple journal submissions made at the same time squander the journal's resources. Furthermore, it gives the impression that you are trying to exploit our publishing system instead of using it as a legitimate channel for publication.
The only exception to this rule is if you are simultaneously submitting the same article to several different journals but with different subject areas. For example, if you are writing on some new method for treating cancer and want to publish it in several different journals, this would be acceptable because you are not wasting any material by submitting it to journals that will never consider it.
In conclusion, please don't do it. It's not only unethical, it's also bad for your reputation and likely to get you rejected from many journals.
No, you cannot send the same work to several journals at the same time. This is referred to as simultaneous or contemporaneous submission and is deemed unethical. If your manuscript is turned down, you can resubmit it to another journal.
The only way around this rule is if you are able to get more than one journal to accept your paper - that is called multicountry publishing and some journals will allow this under certain circumstances. Otherwise, you must limit yourself to a single publication of your work.
Copyright remains with the author even if they publish their work. So if you want your work to be accessible long after you die, then you need to secure its copyright. There are two ways of doing this: by registering your work with the Copyright Office or by including the word "Copyright" in the title page of your manuscript.
Works published without a copyright notice are in the public domain. So if you want others to be able to read your work and build on it, then you need to include this information with your submission.
Even if you do not want your work to enter the public domain, you still need to register its copyright. Without registration, someone could reproduce and sell your work without your permission, which would cause problems for you if you wanted to try and profit from it later.
There is no limit to how many magazines you may send the same story to at the same time, but don't go overboard. It is preferable to maintain it under 10 at all times. You'll have a hard time keeping track if you add much more. Also consider sending material to other publications that might be interested in it.
The more prestigious the publication, the more likely it is to accept your story. That doesn't mean you should send out dozens of requests, but if you have a good idea that might fit some of these categories, then submit it to as many as possible.
Some publications will only print articles from certain writers or editors. If you want your work to be considered for those positions, you'll need to send your stories to them.
Also remember that some magazines won't publish anything online. If that's the case for one you're thinking about submitting to, look into alternatives like journals or newsletters.
Finally, some publications may prefer original content over reprints. If that's the case with any books you're considering, check to see if they still want new material before submitting yours.
In conclusion, don't feel limited by what I've mentioned here. There are plenty of other ways to get published besides through magazines, and this is just a small sample of the available options. Good luck with your writing!