vacuum
it is called a air ball
A completely empty space is called a vacuum. A vacuum does not even have air. Sound cannot travel through a vacuum.
It is when the "correct" air to fuel ratio is used to completely burn the fuel in question in an internal combustion engine. If exactly the correct amount of air is used this is called the stoichiometric mix.
I think it's called a white cap, but I'm not completely sure.
air
When the moon appears completely dark it is called a new moon.
a vacuum.
It will be rock hard.
A plane can not completely stop in the air unless it is a special type of plane. Normal passenger or commercial planes as well as military planes can not stop completely in mid air though some helicopters can stop in mid air.
The pushing force of air is called air pressure.:)
The pushing force of air is called air pressure.:)
vital capacity