Which of the following machines most likely has the greatest efficiency? a
A. Airplane
B. Automobile
C. Bicycle
D. Human body

when earth is in rotational motion around the sun,it displaces from its place.

when a ball is placed on an inclined surface it does both the rotational and circular motion.

explanation:

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.

co2reflects heat radiation back to earth buning coal and oil emits co2 globe warms

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.