The principle involved in the pressing of bales of cotton by a hydraulic press is ___

Options

A. Boyle's law
B. Charle's law
C. Archimedes' principle
D. Pascal's law

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the principle involved in the pressing of bales of cotton using a hydraulic press.

2. **Identifying the Relevant Laws**: The options provided are Boyle's law, Charles' law, Archimedes' law, and Pascal's law. We need to determine which of these laws applies to the operation of a hydraulic press.

3. **Explaining Pascal's Law**: Pascal's law states that when pressure is applied to a confined fluid, the pressure change occurs throughout the fluid in all directions. This means that any increase in pressure at one point in the fluid will be transmitted equally throughout the fluid.

4. **Application of Pascal's Law in a Hydraulic Press**: In a hydraulic press, when a force is applied to a small area (like a piston), it creates an increase in pressure. According to Pascal's law, this pressure is transmitted through the fluid to another area (like a larger piston), resulting in a larger force being exerted on the cotton bales. This allows the cotton to be compressed effectively.

5. **Conclusion**: Therefore, the principle involved in the pressing of bales of cotton by a hydraulic press is Pascal's law.

**Final Answer**: The principle involved in the pressing of bales of cotton by a hydraulic press is **Pascal's law**.

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