Question bank: Waves: Elements of a Wave

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Question 1:

Very Easy

A sound wave propagates in a classroom at a constant speed of 340 m/s. A student claps and creates a sound pulse that travels through the air. The sound pulse moves in all directions and reaches two opposite walls of the room, reflecting back to the point of origin. If the student is at a distance of 5 meters from one of the walls, determine the time it takes for the pulse to reach the other wall and return to the point of origin, considering that the room is an ideal environment without sound absorption, and disregarding the student's reaction time to clap.

Waves: Elements of a Wave

Multidisciplinary Question

Question 2:

Medium

Waves: Elements of a Wave

Question 3:

Very Hard

A sound wave is emitted from a source and propagates in a uniform gaseous medium. At a given moment, an observer detects the wave and realizes that the air pressure at the location where he is located has decreased to a minimum value. Considering that the speed of sound in the air is 343 meters per second, and that the frequency of the sound wave is 1000 Hz, calculate: (1) the distance between two points in the medium where the air pressure is in phase with the wave detected by the observer; (2) the time variation that the observer must wait to detect the next minimum pressure value if he remains at the same observation point. To solve the question, use the concepts of wavelength and period of the wave, knowing that the propagation speed of a wave (v), the frequency (f), and the wavelength (λ) are related by the formula v = λ * f. Consider that the sound wave behaves according to the laws of acoustics and that there are no interferences that could alter its propagation in the gaseous medium.

Waves: Elements of a Wave

Multidisciplinary Question

Question 4:

Medium

During a practical Physics class, students conduct an experiment with a stretched rope, demonstrating the formation of transverse waves. A student agitates the rope causing a series of waves to travel along its entire length. When observing the propagation of these waves, students are asked to identify the constituent elements of a wave. a) Describe and explain at least two elements present in this transverse wave, such as the crest and the trough. b) Determine a way to measure the wavelength and the propagation velocity of these waves formed in the rope during the experiment. c) Discuss the importance of studying waves and how it applies to different contexts and situations.

Waves: Elements of a Wave

Question 5:

Medium

Waves: Elements of a Wave

IARA TIP

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