You pull hard on both ends of a thick spring, but it does not stretch. Is there an action force and, if so, what is it? A. No, there is no action force. B. Yes, the action force is the spring resisting being pulled on. C. Yes, the action force is the pulling on both ends of the spring.

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.

it should be d) transitional fossils.

they show the gradualism of evolution throughout a period of time

i would think a oil tanker that has leaked in a bay