Yes, vacuum trucks are used to empty septic systems. A company that cleans septic tanks most likely has vacuum trucks.
Depends on how big your tank is
No, cause the heavily loaded trucks use more power than the empty trucks. I see you have the same homework assignment as me...
A vacuum is composed of empty space.
THEORETICALLY: An absolute vacuum has no mass contained. In empty space there is no mass, so an absolute vacuum is empty space and empty space is an absolute vacuum. There is no difference. Although, there may be energy passing through the empty space or vacuum in the form of electromagnetic waves, or gravitational or magnetic fields.
Air
A vacuum is an empty space with nothing inside it.
An empty space is called Vacuum.
Empty space is a vacuum.
One day of rainfall would not fill an empty septic tank.
vacuum - i
a vacuum
A vacuum.