question 1\nwhen you observed the phenomena video, what caused the window to move?\n1 pts\na speaker inside…

Brief Explanations:

Sound waves carry energy. When sound is produced by a source like a speaker in a truck, the sound - wave energy can cause vibrations in nearby objects such as windows. Among the options, a speaker in the truck producing sound waves with enough energy to move the window is the most likely cause.

Answer:

A speaker inside the building producing sound waves with sufficient energy to vibrate the window is not correct as the source is said to be in the truck. A truck driving by the building might cause some vibrations due to ground - borne or air - borne disturbances but not as directly as sound from a nearby speaker. A truck engine in the parking lot is more likely to cause vibrations through mechanical means rather than sound - wave induced window movement. The most probable cause is sound blasting from the speaker in the truck as the sound waves can transfer energy to the window and make it move. So the answer is Sound blasting from the speaker in the truck.