How far will a car travel in 15 min at 20m/s?

18000 m

Explanation:

Speed is distance covered per unit time. Time is in minutes so we will convert it first to seconds.

15 mins x 60 s / 1 min. = 900 s

To find distance:

d= v x t = 20 m/s x 900s = 18000 m

Cancel out seconds and the remaining unit is in meters which is the unit for distance.

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.

so easy. just google the electromagnetic waves and it’ll pop up.