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

Explanation:

Given that,

Applied force, F = 200 N

Weight of the object, or the normal force, N = 400 N

We need to find the coefficient of static friction between the object and the surface.

The force of friction has the same magnitude as that of applied force. It can be given by :

mg is weight of the object

So, the coefficient of static friction between the object and the surface is 0.5.