A girl pushes a wagon at constant velocity. If the momentum of the wagon is 50 kg*m/s at a
velocity of 2 m/s, the mass of the wagon is what

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.