The star nearest to our Sun is Alpha Centauri, which is 4.3 light years away. A light year is the distance that lighttravels in one year. 1-light year is about 9,500,000,000,000kilometers. How many astronomical units is it to Alpha Centauri

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

If a simple machine reduces the strength of a force, what must be increased?

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.