How do the Earth's inner and outer core compare? A- The outer core is solid, and the inner core is liquid
B- Both the outer core and inner core are solid
C- Both the inner core and outer core are liquid
D- The inner core is solid, and the outer core is liquid

The amount of potential energy possessed by an elevated object is equal to what?

Aspectroscope breaks light up into its colors, allowing scientists to analyze light from the solar system and universe. by studying the spectral line patterns, widths, strengths and positions, scientists can determine the speed, position, and of celestial bodies. a) age b) origin c) rotation d) temperature

Contrast the force of gravity between these pairs of objects: 1-kg mass and a 2-kg mass that are 1 m apart; a 1-kg mass and a 2-kg mass that are 2 m apart; and two 2=kg masses that are 1 m apart. i dont understand.