How far can light travel in one year?

That depends on what it's traveling IN.  The speed of light is different in every substance.  

It's fastest in NO substance ... in vacuum, like in outer space.  The speed of light in vacuum is 299,792,458 meters per second.

That's

9,454,254.955 million kilometers / 5,874,601.672 million miles

in 365.0 days.

your answer is c! hope this : )

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is