The speed will depend on the type of gas and on its density.
Yes, they travel some fast!
Copper is opaque to light - light can not travel though it.
the speed of light
it can travel from 380nm [nanometres] to 740nm
The 2002 Hyundai Sonata has a gas light that comes on when the gas is low. After the gas light comes on the car can travel 25 to 30 miles.
Darkness is the absence of light and will therefore travel at the speed of light (6x108m/s)
light travels faster.
it travels fast in gases
The odour of a gas is the gas itself, the speed of the gas moving is dependant on the various factors such as wind and pressure difference.
yes
at the speed of light
Speed of light.