18. Waves & Sound

Which statement best describes longitudinal waves?

Which statement best describes how sound travels through a medium as a longitudinal wave?

$\text{Which type of wave are sound waves in air?}$

A motion sensor can accurately measure the distance d to an object repeatedly via the sonar technique used in Example 16–2. A short ultrasonic pulse is emitted and reflects from any objects it encounters, creating echo pulses upon their arrival back at the sensor. The sensor measures the time interval t between the emission of the original pulse and the arrival of the first echo. Assume that during a lab period the room’s temperature increases from 20°C to 23°C. What percent error will this introduce into the motion sensor’s distance measurements?

Which of the following is an example of a longitudinal wave?

Which statement best describes how sound energy travels in a medium as a longitudinal wave?

Which of the following best describes how to measure the amplitude $A$ of a longitudinal wave?

In a longitudinal wave, how does the direction of vibration of the particles compare to the direction of motion of the wave?

Which type of longitudinal wave can travel through both solids and liquids?

Which of the following is an example of a compressional (longitudinal) wave?

Which of the following statements is true about longitudinal waves?

In a longitudinal wave, energy is transferred in a direction that is $—$ to the direction of the wave's movement.

Which type of wave best describes the propagation of sound in air?

When a sound wave passes through a medium, what happens to the particles of the medium?