What causes a star to shine brightly

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?

Select all of the methods through which a drug can enter your body. injection swallowing inhalation absorption