La cavitación

The video explains how propellers deteriorate due to cavitation, a process where low-pressure zones cause water to evaporate and form bubbles. These bubbles can damage propellers when they implode, releasing energy as heat and shock waves. Cavitation affects not only propellers but also marine life, such as dolphins, which are limited in speed to avoid damage. Some creatures, like the pistolera prawn, use cavitation to their advantage by creating shock waves to stun prey.

What phenomenon occurs when propellers create low-pressure zones in water?

• Evaporation

• Cavitation

• Condensation

• Sublimation

What happens to the bubbles formed during cavitation when they collapse?

• They release water

• They release energy in the form of heat and shock waves

• They release sound

• They release light

How does cavitation affect metal propellers?

• It strengthens them

• It has no effect

• It damages them

• It polishes them

Why can't dolphins swim faster than 54 km/h?

• They can't breathe underwater

• They get tired

• They are afraid of predators

• Cavitation could damage their tails

How does the Pistolera prawn use cavitation?

• To communicate

• To stun its prey

• To create light

• To swim faster