-. A sky diver jumps from a hovering helicopter and hits the ground at a speed of 30 m/s. How long does it take for the sky diver to land on the ground and how far
does it fall? (Ignoring air resistance and acceleration due to gravity is 10 m/s2).​

b

explanation:

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.