Testing for which of the following can detect cataracts or problems of the retina even before the sharpness of the patient's vision is impaired?

Which of the following is the active ingredient in Tylenol®?

naproxen ibuprofen acetaminophen aspirin

As the mA doubles, the number of electrons flowing from cathode to anode

a. increases fourfold. b. increases twofold. c. decreases twofold. d. increases by 50%.