Abodybuilder loads a bar with 550 newton’s (125 pounds) of weight and pushes the bar over her head 10 times. each time she lifts the weight 0.5 meters. how much work did she do?

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.