The advantages of infrared waves are . A. that they harden dental fillings and make vitamin D in the body

B. that they sterilize medical equipment and kill cancer cells

C. that they provide warmth and read information stored on computer disks

D. that they inspect packaged products and set broken bones

Who was the first scientist to measure speed as distance over time?

When you see distant streetlights through smog, they look dimmer and redder than they do normally. but when you see the same streetlights through fog or falling snow, they look dimmer but not redder. use your knowledge of the interstellar medium to discuss the relative sizes of the particles in smog, fog, and snowstorms compared to the wavelength of light.

Asimple electrochemical cell contains two electrodes.