Why do they call it a vacuum cleaner since a vacuum is an empty space?
It is usually hooked up to your kitchen sink p-trap or garburator under the sink, which is vented. This is the only vent you need for drainage.
A vacuum cleaner is a space entirely empty of what?
What will happen after vacuuming up the spills from a broken thermometer what happened to these spills in the vacuum cleaner can they escape from the bag should vacuum cleaner be disposed?
No, they won't escape the bag and you can keep the vacuum.
How do you empty the cup of eureka vacuum cleaner cup?
The first automatic vacuum cleaner was patented by Hubert Booth.