Infrared light of wavelength 2.5 mm illuminates a 0.20-mmdiameter hole. What is the angle of the first dark fringe in radians? In degrees?

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

An object's buoyant force and weight mean the same thing. a. trueb. false

Avoltaic cell converts chemical energy to