Response:
a. the lowest layer
Clarification:
This layer has the least refractive index, thus being the most rarefied.
Response:
(e) thermal expansion
Clarification:
The density, heat of fusion, and melting temperature of a metal are critical factors to consider when increasing its temperature from room temperature to its melting point. These will dictate the following aspects:
Density: refers to the ratio between a body's mass and the space it occupies in the universe.
Heat of fusion: The enthalpy of fusion or heat of fusion signifies the amount of energy required to cause a mole of an element at its melting point to transition from solid to liquid state, under constant pressure.
Melting temperature is defined as the thermal level at which the phase change from solid to liquid takes place under standard atmospheric pressure.
On the other hand, the dilution of metals only influences the volume they will occupy without affecting the heating process
