Explain why light years are the ONLY PRACTICAL units to use in space, and why these units are not used on Earth.

Which surface feature of the moon is characterized by mountainous areas? terrae craters maria regolith

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

What is a subatomic particle with a negative charge and very little mass?