Answer:
Speed of light = 3 * 10 ^8 m / s. Speed is related to the distance and time and so its unit is in meters and seconds. The speed of light value mentioned above is the value calculated in vacuum or air with the help of lasers.
But when it comes to water, refractive index has to be taken into account.The speed of light is faster in vacuum than other mediums.
by the engine and is equal to the opposite
force of air resistance. Describe how these
forces compare when the plane speeds up
and slows down. In which direction is the
net force on the airplane in each case?
Explanation:
In an airplane flying a constant speed, the force exerted by the engines pushing the plane forward is equal to the opposite force exerted by air resistance.