12. The Graph Represents The Amount Of Heat Absorbed By Two Objects, A And B, When Heated, Depending On Their Temperatures. Observe The Chart And Tick The Correct Proposition (s). Give As Response To The Sum Of The Numbers That Precede The

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Heat Absorption and Temperature Relationship

The graph provided represents the amount of heat absorbed by two objects, A and B, when heated, depending on their temperatures. To understand the relationship between heat absorption and temperature, we need to analyze the graph and identify the correct propositions.

Analyzing the Graph

The graph shows that as the temperature of objects A and B increases, the amount of heat absorbed also increases. However, the rate of heat absorption is not the same for both objects. Object A absorbs heat at a faster rate than object B.

Propositions to Consider

Based on the graph, we can consider the following propositions:

  • Proposition 1: The amount of heat absorbed by object A is greater than the amount of heat absorbed by object B at the same temperature.
  • Proposition 2: The rate of heat absorption for object A is faster than the rate of heat absorption for object B.
  • Proposition 3: The amount of heat absorbed by object B is greater than the amount of heat absorbed by object A at the same temperature.
  • Proposition 4: The rate of heat absorption for object B is faster than the rate of heat absorption for object A.

Evaluating the Propositions

To evaluate the propositions, we need to analyze the graph and identify the correct relationship between the amount of heat absorbed and the temperature of objects A and B.

  • Proposition 1: Based on the graph, we can see that object A absorbs more heat than object B at the same temperature. Therefore, Proposition 1 is correct.
  • Proposition 2: The graph shows that object A absorbs heat at a faster rate than object B. Therefore, Proposition 2 is correct.
  • Proposition 3: Based on the graph, we can see that object B absorbs less heat than object A at the same temperature. Therefore, Proposition 3 is incorrect.
  • Proposition 4: The graph shows that object A absorbs heat at a faster rate than object B. Therefore, Proposition 4 is incorrect.

Conclusion

Based on the analysis of the graph, we can conclude that the correct propositions are:

  • Proposition 1: The amount of heat absorbed by object A is greater than the amount of heat absorbed by object B at the same temperature.
  • Proposition 2: The rate of heat absorption for object A is faster than the rate of heat absorption for object B.

The sum of the numbers that precede the correct propositions is 2.

Discussion Category: Physical

Key Takeaways:

  • The amount of heat absorbed by an object depends on its temperature.
  • The rate of heat absorption can vary between objects.
  • Analyzing a graph can help identify the correct relationship between variables.

Further Reading:

  • Heat Transfer: A comprehensive guide to heat transfer, including conduction, convection, and radiation.
  • Thermal Properties: A detailed explanation of thermal properties, including specific heat capacity and thermal conductivity.
  • Temperature Measurement: A guide to temperature measurement, including thermometers and thermocouples.
    Heat Absorption and Temperature Relationship: Q&A =====================================================

Frequently Asked Questions

Q: What is the relationship between heat absorption and temperature?

A: The graph shows that as the temperature of objects A and B increases, the amount of heat absorbed also increases. However, the rate of heat absorption is not the same for both objects.

Q: Why does object A absorb heat at a faster rate than object B?

A: The exact reason for the difference in heat absorption rates between objects A and B is not specified in the graph. However, it could be due to differences in their physical properties, such as specific heat capacity or thermal conductivity.

Q: Can you explain the concept of specific heat capacity?

A: Specific heat capacity is the amount of heat energy required to raise the temperature of a unit mass of a substance by one degree Celsius. It is an important property that determines how much heat an object can absorb before its temperature changes.

Q: How does thermal conductivity affect heat absorption?

A: Thermal conductivity is the ability of a material to conduct heat. Materials with high thermal conductivity can transfer heat more efficiently, while materials with low thermal conductivity can slow down heat transfer. This can affect the rate of heat absorption in objects.

Q: What is the significance of the graph in understanding heat absorption?

A: The graph provides a visual representation of the relationship between heat absorption and temperature. It helps to identify the correct propositions and understand the differences in heat absorption rates between objects A and B.

Q: Can you explain the concept of heat transfer?

A: Heat transfer is the process by which heat energy is transferred from one object to another. There are three main modes of heat transfer: conduction, convection, and radiation. Conduction occurs through direct contact between objects, convection occurs through the movement of fluids, and radiation occurs through electromagnetic waves.

Q: How does temperature affect heat absorption?

A: As temperature increases, the amount of heat absorbed by an object also increases. However, the rate of heat absorption can vary depending on the object's physical properties and the mode of heat transfer.

Q: Can you provide examples of objects with high and low specific heat capacities?

A: High specific heat capacity: Water has a high specific heat capacity, which means it can absorb a lot of heat energy before its temperature changes. Low specific heat capacity: Metals like copper have a low specific heat capacity, which means they can transfer heat quickly but may not be able to absorb as much heat energy.

Discussion Category: Physical

Key Takeaways:

  • The amount of heat absorbed by an object depends on its temperature and physical properties.
  • The rate of heat absorption can vary between objects and modes of heat transfer.
  • Analyzing a graph can help identify the correct relationship between variables.

Further Reading:

  • Heat Transfer: A comprehensive guide to heat transfer, including conduction, convection, and radiation.
  • Thermal Properties: A detailed explanation of thermal properties, including specific heat capacity and thermal conductivity.
  • Temperature Measurement: A guide to temperature measurement, including thermometers and thermocouples.