How do you think meteorologists predicted the arrival of a hurricane before the 1990s?
(Please help with a short sentence)

How does friction with the atmosphere affect the speed of an artificial satellite

Someone me with this: a mineral' is determined by its actomic structure.

Which statement describes a way in which the digestive and excretory systems work together? a. the nephrons absorb nutrients from food going to the large intestine. b. the excretory system balances blood gases in the small intestine. c. the intestinal villi filter blood and send wastes to the bladder. d. the excretory system balances the salts and water obtained from digested food