Name the physical quantity measured in terms of horse power.

Explanation

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks for the physical quantity that is measured in terms of horse power.

2. **Define Horse Power**: Horse power (hp) is a unit of measurement for power. It was originally developed to compare the output of steam engines with the power of draft horses.

3. **Identify the Physical Quantity**: The physical quantity that is measured in terms of horse power is power.

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