Specific heat capacity of substance A is `3.8Jg^(-1)K^(-1)` whereas the specific heat capacity of substance B is `0.4Jg^(-1)K^(-1)`.
How is one led to the above conclusion ?

Explanation

To solve the problem regarding the specific heat capacities of substances A and B, we can follow these steps:

### Step-by-Step Solution

1. **Understanding Specific Heat Capacity**:
- Specific heat capacity (C) is defined as the amount of heat (Q) required to raise the temperature of a unit mass (m) of a substance by one degree Kelvin (or Celsius).
- The formula relating these quantities is given by:
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