Pressure applied to an enclosed fluid is transmitted undiminished to every portion of the fluid and the walls of the containing vessel. This law was first formulated by

The correct answer is Pascal.

Explanation:
The statement in the question refers to one of the fundamental principles in fluid mechanics, which states that any change in pressure applied to an enclosed fluid is transmitted undiminished throughout the fluid and to the walls of its containing vessel. This principle is known as Pascal's Law (or Pascal's Principle).

This law was formulated by the French mathematician, physicist, and philosopher Blaise Pascal in the 17th century. It forms the basis of many modern hydraulic systems, such as hydraulic lifts, jacks, and brakes, where a small force applied over a small area is transmitted to create a much larger force over a larger area.

Let's briefly review why the other options are incorrect:
• Bernoulli: Formulated Bernoulli's principle, which relates fluid speed, pressure, and potential energy in a flowing fluid.
• Archimedes: Formulated Archimedes' principle, which explains buoyancy and the buoyant force acting on a submerged object.
• Boyle: Formulated Boyle's law, which relates the pressure and volume of a gas at a constant temperature.