Gravitational forces are forces of attraction. It's like the Earth pulling on you and keeping you on the ground.
Dr. Inge discovered the make up of the earths inner core by studying how an earthquakes waves bounced off the core. And Inge Lehmann was studying the waves of a 1929 earthquake when she found them acting inconsistently with solid mantle crust
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At the center, when the bob is hanging straight down
Bacteria in your stomach is actually good for you because it helps destroy harmful bacteria by picking at undigested leftovers and micromanaging calories.
