The electromagnetic spectrum is a range of different magnetic strengths *
true
false

Current enters a circuit at a: 1.positive terminal 2.negative terminal 3.low potential side 4.resistor

To create electromagnetic induction, which of the following has to move? a. a wire b. a magnet c. a transformer d. either a or b

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.