Why is it best to get away from city lights to view
the nighttime sky?

Because if you want to see the stars, you'll have to go somewhere where there is no light. cuz if there is light then it will be hard to see the nighttime sky.  

Explanation:

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6

  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