What is one example of the use of an infrared sensor? a. detecting the presence of humans trapped under collapsed buildings. b. monitoring feed for farm animals to keep them healthy. c. bar code sensor tracks store inventory. d. information is relayed to a visually impaired individual about the location of objects. i need this answer! 

Which feature indicates that mars resides in the inner region of the solar system

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

Select the best definition for wavelength. the height of an oscillating electromagnetic wave the rate at which electromagnetic waves oscillate. the distance between two crests of an electromagnetic wave. the oscillations of electric and magnetic fields select the best definition for frequency. the oscillations of electric and magnetic fields. the height of an oscillating electromagnetic wave. the distance between two crests of an electromagnetic wave. the rate at which electromagnetic waves oscillate