On which of the following scales of temperature, the temperature is never negative

Options

A. Celsius
B. Fahrenheit
C. Reaumur
D. Kelvin

Explanation

To determine which temperature scale never has negative values, we can analyze each of the given options:

1. **Celsius Scale**: The Celsius scale has a freezing point of water at 0 degrees Celsius. Temperatures below this point can be negative (e.g., -10°C, -20°C). Therefore, the Celsius scale can have negative temperatures.

2. **Fahrenheit Scale**: The Fahrenheit scale has a freezing point of water at 32 degrees Fahrenheit. It also allows for negative temperatures (e.g., -10°F, -20°F). Thus, the Fahrenheit scale can have negative temperatures.

3. **Rankine Scale**: The Rankine scale is an absolute temperature scale used in thermodynamics. It starts at absolute zero, similar to the Kelvin scale, but is measured in degrees Fahrenheit. However, it can also have negative values when converted to other scales. Therefore, the Rankine scale can have negative temperatures.

4. **Kelvin Scale**: The Kelvin scale is an absolute temperature scale that starts at absolute zero (0 K), which is equivalent to -273.15°C. Since there is no temperature below absolute zero, the Kelvin scale does not have negative values.

Based on this analysis, the only temperature scale that never has negative values is the **Kelvin scale**.

**Final Answer**: The temperature scale that is never negative is the **Kelvin scale**.

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