Final answer:
The idea is known as Pascal's Law, which states that a change in pressure applied to a fluid is transmitted throughout the fluid with a constant magnitude. Pascal's Law has practical applications in hydraulic systems.
Step-by-step explanation:
The idea that can be stated as, "A change in pressure applied to a fluid is transmitted throughout the fluid with a constant magnitude" is known as Pascal's Law.
Pascal's Law states that when pressure is applied to a fluid in an enclosed space, the pressure change will be transmitted equally in all directions within the fluid. This means that if you apply pressure to one part of the fluid, the entire fluid will experience the same change in pressure.
One practical application of Pascal's Law is hydraulic systems. These systems use fluids (usually oil) to transmit pressure and multiply force. They are widely used in many machines and devices, such as car brakes, hydraulic lifts, and construction equipment.
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