When a solid is placed in a container and heat is applied, a phase change occurs. watch the video and identify which of the following statements are correct. check all that apply. view available hint(s) check all that apply. the temperature increases while all of a liquid is converted to a gas. the average kinetic energy of the system changes while all of a solid is converted to a liquid. temperature remains constant while all of a solid is converted to a liquid. when heat is applied to a solid, the molecular motion decreases as the temperature increases. when a solid is converted to a liquid, heat is absorbed.

a) false b) true c) true d) false and e) true

Explanation:

a) false.   All the energy applied is used for the phase change, so the temperature remains constant.

b)   true.   The kinetic energy is associated with the speed of the particles and they have more mobility in the liquid, therefore, more kinetic energy.

c)   true.   Since energy is used for state change

d)  false.   In general, mobility and temperature are proportional

e)  true.  Heat is the source of energy for the change of state

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.