A dish is given to you, which contains a blackish-yellow powder. When you move a magnet over it, black particles fly upwards and get stuck to the magnet. All that's left in the dish is a yellow powder, which you discover to be sulfur. Was the original powder an element, compound, or mixture?

What pressure difference is required between the ends of a 2.0-m-long, 1.0-mm-diameter horizontal tube for 40 c water to flow through it at an average speed of 4.0 m/s?

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

According to the image below, which season is about to begin in the southern hemisphere? a. summer b. autumn c. winter d. spring