Using your knowledge of lightspeed, what is the difference between a parsec and lightyear?

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.

10 newton object is placed 3 meters from the fulcrum. at what distance on the other side would you need to place a 15 newton object to balance the lever? show your work!

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation