Pieces of lead, copper, iron, and granite, each having a mass of 1 kilogram and a temperature of 100°C, were removed from a container of boiling water and allowed to cool under identical conditions. Which piece most likely cooled to room temperature first?
1.copper
2.lead
3.iron
4.granite
or this one
A camper takes a 100-gram piece of basalt rock from a campfire and places it in a cup holding 250 milliliters of water. The temperature of the rock is 300°C and the temperature of the water is 20°C. Air temperature is also 20°C. Which statement best describes the rock-water system?
1.The rock is the heat sink, and the water is the heat source.
2.The rock is the heat source, and the water is the heat sink.
3.The rock and the water are both heat sources.
4.The rock and the water are both heat sinks.
1.copper
2.lead
3.iron
4.granite
or this one
A camper takes a 100-gram piece of basalt rock from a campfire and places it in a cup holding 250 milliliters of water. The temperature of the rock is 300°C and the temperature of the water is 20°C. Air temperature is also 20°C. Which statement best describes the rock-water system?
1.The rock is the heat sink, and the water is the heat source.
2.The rock is the heat source, and the water is the heat sink.
3.The rock and the water are both heat sources.
4.The rock and the water are both heat sinks.