An infrared light detector would be most beneficial to someone who investigates a. how insects use sound to communicate. b. the colors produced by different atmospheric conditions. c. the aerodynamics of hummingbird wings. d. the wavelengths of light produced by chemical reactions.

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.

How much energy must a refrigerator absorb from 225 g of water so that the temperature of the water will drop from 35°c to 5°c

What organization and environment is described above?