The gravitational force between iwo objects is 100 N. If the mass of each object is doubled, what is the
gravitational force between the objects at the same
distance?
25 N
50 N
200 N
400 N

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.