Automobiles are often used as an analogy to people better understand how more massive stars have much shorter main-sequence lifetimes compared to less massive stars. can you explain such an analogy using automobiles?

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!

You want to lose weight and have been trying to decide which type of fad diet is best for you. you ask your doctor, who responds that a. fad diets are a temporary fix but generally don't have any side effects b. fad diets can be used several times a year to maintain a healthy weight c. fad diets can be risky for your health and, in the long run, do not work d. fad diets should never be used one right after the other; there should be a break between them select the best answer from the choices provided. a b c d

The solid that is formed and usually sinks to the bottom of a solution is the