DIY: Liquefaction

The video tutorial demonstrates an experiment to understand liquefaction, a phenomenon where the ground loses its strength due to saturation, often occurring during earthquakes. The experiment uses sand, water, a ping pong ball, and a brick to simulate the effects of liquefaction. The tutorial explains the setup, execution, and observation of the experiment, highlighting the importance of understanding liquefaction for building safe infrastructure.

What are the initial materials required for the liquefaction experiment?

• Sand, a ping pong ball, and a large spoon

• Sand, water, ping pong ball, and a basin

• Sand, water, a brick, and a mallet

• Water, a stirring spoon, and a metal basin

What is the purpose of burying the ping pong ball in the sand?

• To balance the weight of the brick

• To keep the sand evenly damp

• To demonstrate how objects sink in water

• To show how liquefaction affects buried objects

What happens to the brick during the liquefaction demonstration?

• It falls as the ground liquefies

• It floats on the water

• It sinks into the sand

• It remains stable on the sand

What does the rising of the ping pong ball represent in the experiment?

• The buoyancy of objects in water

• The movement of water in the basin

• The effect of liquefaction on buried objects

• The stability of structures during an earthquake

Why is understanding liquefaction important for infrastructure?

• To enhance the aesthetic appeal of structures

• To improve water drainage systems

• To reduce the cost of construction materials

• To design earthquake-resistant buildings and bridges