25 points plz ! which equation is most likely used to determine the acceleration from a velocity vs. time graph? a = t over delta v. m = startfraction v subscript 1 - v subscript 2 over x subscript 2 minus x subscript 1 endfraction. a = delta v over t. m = startfraction x subscript 2 minus x subscript 1 over v subscript 1 - v subscript 2 endfraction.

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

they are made of gases.

they have a spherical shape.

they make energy through fusion.

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.