what color does acid turn red litmus papera substance tested with blue litmus paper, is clear and colorless, and feels slippery. What can you determine about this substance

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

1. how to locate the image in converging(concave) mirror and diverging (convex) mirror with salt. 2. how to locate the image in a converging (convex) lens and diverging (concave) lens with salt.

In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?