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
Darkness is the absence of light and will therefore travel at the speed of light (6x108m/s)
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.
yes
at the speed of light
Speed of light.
Approx 9.46 trillion km.
Yes ... in a vacuum.
no from what i have learned light travels faster then sound