Asap‼️ can someone answer this question i’m confusion❔

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.

The softest and hardest minerals are: softest hardest

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false