Acontact lens is made of plastic with an index of refraction of 1.60. the lens has an outer radius of curvature of +1.94 cm and an inner radius of curvature of +2.48 cm. what is the focal length of the lens?

According to newton’s law of universal gravitation, which statements are true? as we move to higher altitudes, the force of gravity on us decreases. as we move to higher altitudes, the force of gravity on us increases. as we gain mass, the force of gravity on us decreases. as we gain mass, the force of gravity on us increases. as we move faster, the force of gravity on us increases.