If the distance of the track is 100 cm and it takes the marble 5 seconds to go from beginning to end, what is the speed ?

Explanation:

speed = distance ÷ time

= 100 cm ( 1 meter ) ÷ 5 seconds

= 20 cm/s

= 0.2 m/s

20 cm/sec or 0.2 m/sec

Explanation:

Please give me brainliest :)

b..

is the correct one

explanation:

covalent bonds form as valence electrons are shared between two atoms. lewis structures and structural formulas are common ways of showing the covalent bonding in organic molecules. formal charge describes the changes in the number of valence electrons as an atom becomes bonded into a molecule.