When heating a substance, a phase change will start to occur when the kinetic energy of the particles is the attractive forces between the particles. question 8 options:
a. great enough to combine
b. low enough to combine
c. low enough to overcome
d. equal to
e. great enough to overcome

E. great enough to overcome.

Explanation: The three phases of the substances are solid, liquid and gas.

When a substance is heated, that is the molecules gain kinetic energy as kinetic energy is directly proportional to temperature.

The phase change will take place only when kinetic energy will be greater than the inter molecular forces as the molecules have to move in more random motion.

For example: Solid with high inter molecular forces are heated to convert it into liquid state only when kinetic energy will overcome the inter molecular forces of attraction.

half of a circle

explanation:

the arrow and the top of the circle is matching together. it is not a polygon because a polygon would always be the same shape. therefore, an half of a circle is called semicircle so you would find the radius of it.