The specific heat capacity of a substance A is `3,800Jkg^(-1)K^(-1)` and that of a substance B is `400Jkg^(-1)K^(-1)`. Which of the two substances is a good conductor of heat ? Give a reason for your answer.

Explanation

To determine which of the two substances, A or B, is a good conductor of heat based on their specific heat capacities, we can follow these steps:

### Step 1: Understand Specific Heat Capacity
Specific heat capacity is defined as the amount of heat required to raise the temperature of a unit mass of a substance by 1 Kelvin (or 1 degree Celsius).

### Step 2: Compare Specific Heat Capacities
Given:
- Specific heat capacity of substance A = 3800 J/kg·K
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