In a room containing air,, heat can go from one place to anther

Options

A. by conduction only
B. by convection only
C. by radiation only
D. by all the three modes.

Explanation

To solve the question regarding how heat can transfer in a room containing air, we will analyze the three modes of heat transfer: conduction, convection, and radiation.

### Step-by-Step Solution:

1. **Understanding Heat Transfer Modes**:
- Heat transfer can occur through three primary modes: conduction, convection, and radiation.

2. **Conduction**:
- Conduction is the process where heat is transferred through direct contact between materials. In a room, if there are solid objects (like walls or furniture), heat can be conducted through these materials when they come into contact with warmer or cooler air.

3. **Convection**:
- Convection involves the movement of fluid (in this case, air) to transfer heat. When air is heated, it becomes less dense and rises, while cooler air moves down to take its place. This creates a convection current that helps distribute heat throughout the room.

4. **Radiation**:
- Radiation is the transfer of heat through electromagnetic waves. Unlike conduction and convection, radiation does not require a medium. Heat from a source (like the sun or a heater) can travel through the air and warm up objects in the room.

5. **Conclusion**:
- In a room containing air, heat can transfer through all three modes: conduction (through solid objects), convection (through the movement of air), and radiation (through electromagnetic waves). Therefore, the correct answer is that heat can go from one place to another by all three modes.

### Final Answer:
Heat can go from one place to another in a room containing air by **all three modes**: conduction, convection, and radiation.

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