PLZ HELP 100 POINTS Which of the statements below are TRUE, knowing what we know about forces and motion?

Choose ANY that are TRUE.

A)Objects in motion need a force to keep them in motion.
Without an unbalanced force, an object will keep its state of motion.

b)An object needs a net force in order to accelerate.

C)Inertia means that an object will keep accelerating.

d)The normal force and gravity force acting on one object are examples of Newton's 3rd law action/reaction pairs.

1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false

The variability in marine salinity between habitats does not impact the fish living there. select the best answer from the choices provided t f

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.