Answer:
Lead
Explanation:
The material that will warm up the fastest would be lead.
The specific heat capacity of a substance is the amount of heat required to raise the temperature of a unit of the substance by one degree. The higher the specific heat capacity of a substance, the higher the amount of heat required to raise the temperature of the substance and vice versa.
The specific heat capacity (in J/g °C) of granite, iron, copper, and lead are as follows:
Granite - 0.790
Iron - 0.450
Copper - 0.385
Lead - 0.129
From the table, lead has the lowest specific heat capacity, hence, it will be the fastest to get warmed when equal masses of all the substances are placed in the sunlight.
