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)`.
If substances A and B are liquids then which one would be more useful in car radiators ?

Explanation

To determine which substance would be more useful in car radiators based on their specific heat capacities, we can follow these steps:

### Step 1: Understand Specific Heat Capacity
Specific heat capacity is the amount of heat required to raise the temperature of 1 gram of a substance by 1 Kelvin (or 1 degree Celsius). A higher specific heat capacity means that the substance can absorb more heat without a significant increase in temperature.

### Step 2: Compare the Specific Heat Capacities
- Specific heat capacity of substance A = 3.8 J/g·K
- Specific heat capacity of substance B = 0.4 J/g·K
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