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Which device uses a probe to determine speed through the water?

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Final answer:

A Pitot tube, based on Bernoulli's principle, uses a probe to determine speed through the water by measuring the pressure difference between two tubes, one facing the flow and one at the side.

Step-by-step explanation:

The device that uses a probe to determine speed through the water is known as a Pitot tube, also referred to as a Prandtl tube. This device measures fluid velocity based on Bernoulli's principle. The Pitot tube works by comparing the pressure in two tubes: one with an opening facing the flow, creating a dead spot with zero speed, and another with an opening on the side where the fluid speed is present, causing a drop in pressure. The difference in pressure, measured by a manometer, reflects the fluid's velocity. Such tubes are frequently used to measure airspeed in aircraft and can also be used in water to determine the speed of a vessel relative to the water. To use a Pitot tube in an experiment to determine the speed of waves created within the water, you would need the Pitot tube itself, a manometer, and a stopwatch to time the wave generation and movement.

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