Athickness of a material is a factor that affects heat conductivity. does heat flow faster through a thick or a thin piece of the same material? the surface area of a material is a factor that affects heat conductivity.  does heat flow faster through a large surface area or through a small surface area?   why?   (hint:   think about the number of particles available to bump into one another).change in temperature is a factor that affects heat conductivity.  will heat flow faster when there’s a large change in temperature or a small change in temperature?

1. Heat flows faster through a thin material.

2. Heat flows through a large surface area.

3. Heat flows faster for a large change in temperature.

Explanation:

Thinking process:

Newton's law of cooling or heat transfer is given by the following equation:

Where Q = Heat change (J)

A = area of hear transfer (m²)

= Change in temperature.

However, for a temperature difference across the wall having a thickness "x"and  a constant surface area A, we get,

Where x = thickness of the material

As we can see, increasing the thickness, x, decreases the heat flux

Increasing the area, A increases the heat flux

A big temperature increase, ΔT results in a large heat transfer.

the answer for sodium is 0.186

the answer for rubidium is 0.251

c (diamond),

sio2 (quartz)