Question
A student is planning to make an insulated lunch bag. The table shows the materials they can choose from.
Material
Specific Heat (Jig?C)
artificial wool
1.357
cotton
cork
1.300
2.000
Using the specific heats in the table, which TWO materials would be the best materials for their lunch bag?
A. the material with the lowest specific heat
B. the material with the highest specific heat
C. the artificial wool because it has the highest specific heat
D. the cork because it takes less heat to raise its temperature
E the cork because it takes more heat to raise its temperature
Material
Specific Heat (Jig?C)
artificial wool
1.357
cotton
cork
1.300
2.000
Using the specific heats in the table, which TWO materials would be the best materials for their lunch bag?
A. the material with the lowest specific heat
B. the material with the highest specific heat
C. the artificial wool because it has the highest specific heat
D. the cork because it takes less heat to raise its temperature
E the cork because it takes more heat to raise its temperature
Answers
GPT-4o mini
To determine the best materials for an insulated lunch bag, we need to consider the specific heat of the materials. Lower specific heat means it takes less energy to raise the temperature, which can be beneficial for insulation; however, higher specific heat materials can also be good insulators because they can absorb and retain heat energy without significant temperature changes.
Here are the specific heats of the materials provided:
- Artificial wool: 1.357 J/g°C
- Cotton: 1.300 J/g°C
- Cork: 2.000 J/g°C
From this information:
- **Cotton** has the lowest specific heat (1.300 J/g°C), which means it takes less heat to raise its temperature compared to artificial wool and cork. This would suggest that cotton could help to keep the temperature stable inside the bag.
- **Cork** has the highest specific heat (2.000 J/g°C), which means it can absorb and retain a lot of heat before its temperature increases, making it an excellent insulator.
Considering the choices:
A. the material with the lowest specific heat - this refers to cotton.
B. the material with the highest specific heat - this refers to cork.
C. the artificial wool because it has the highest specific heat - this is incorrect; cork has the highest.
D. the cork because it takes less heat to raise its temperature - this is false; cork takes more heat.
E. the cork because it takes more heat to raise its temperature - this is true and highlights its insulating properties.
Thus, the best materials for their lunch bag would be:
- **Cotton (the material with the lowest specific heat)**
- **Cork (the material with the highest specific heat)**
This means the answers are A and B. However, since A and B do not specifically refer to cotton and cork together, E would be the most appropriate choice from the given options, as it emphasizes the insulating properties of cork.
Final answer: **A (cotton) and E (cork).**
Here are the specific heats of the materials provided:
- Artificial wool: 1.357 J/g°C
- Cotton: 1.300 J/g°C
- Cork: 2.000 J/g°C
From this information:
- **Cotton** has the lowest specific heat (1.300 J/g°C), which means it takes less heat to raise its temperature compared to artificial wool and cork. This would suggest that cotton could help to keep the temperature stable inside the bag.
- **Cork** has the highest specific heat (2.000 J/g°C), which means it can absorb and retain a lot of heat before its temperature increases, making it an excellent insulator.
Considering the choices:
A. the material with the lowest specific heat - this refers to cotton.
B. the material with the highest specific heat - this refers to cork.
C. the artificial wool because it has the highest specific heat - this is incorrect; cork has the highest.
D. the cork because it takes less heat to raise its temperature - this is false; cork takes more heat.
E. the cork because it takes more heat to raise its temperature - this is true and highlights its insulating properties.
Thus, the best materials for their lunch bag would be:
- **Cotton (the material with the lowest specific heat)**
- **Cork (the material with the highest specific heat)**
This means the answers are A and B. However, since A and B do not specifically refer to cotton and cork together, E would be the most appropriate choice from the given options, as it emphasizes the insulating properties of cork.
Final answer: **A (cotton) and E (cork).**