A snow machine sprays artificial snow at a rate of 4 g/s (grams per second) and a velocity of 6m/s What is the horizontal force exerted by the snow machine on the ground?

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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.