HESI A2 test Physic - Waves And Sound

A group of students wants to measure the speed of sound. They have a computer program with which they can produce sound and flash a light while producing it. A couple of students stand at a distance of 800 meters, and they measure the time gap between seeing the light and hearing the sound by using a chronometer. They measured the time as 2.34 s. So, at what is the speed of the sound wave?

341.9 m/s

A mechanical wave is associated with materials or substances known as mediums. Which of the following is not a type of mechanical wave?

Radio waves

A pendulum makes 26 vibrations every 13 seconds. What is the frequency?

2 Hz

A wave moves through a medium at a speed of 2.65 m/s with a wavelength of 0.53 meters. What is the frequency of the wave?

5 Hz

A wave travels 36 m/s and has a wavelength of 5.3 m. What would be the frequency of the wave?

6.79 Hz

Experiments have shown that the maximum wavelength of a sound wave that a healthy person can hear is 17 meters. What would be the frequency of this sound? (The speed of sound is 340 m/s)

20 Hz

If a basketball bounces 15 times every 20 seconds, what is its frequency?

0.75 Hz

If a patient breathes 720 times in 60 minutes, what is the breathing period of this patient in seconds?

5 s

If a wave in a string travels at 52 m/s and has a wavelength of 0.65 m, what is the frequency?

80 Hz

In which of the following medium can only electromagnetic waves can travel through?

Space

Multiplication of which of the following two entities gives us the speed of the wave?

Frequency and wavelength

The frequency of a wave is 20 Hz. What is the period of this wave?

0.05 s

We see waves in oceans, lakes and rivers; which of the following cannot be named as a type of those waves?

Longitudinal waves

What is the unit of measure for frequency?

Hertz

What would be the frequency of a string wave if it travels at a speed of 67 m/s and has a wavelength of 7.2 meters?

9.31 Hz

Which one of the following is the definition of Amplitude?

The maximum displacement of the wave from equilibrium

Which one of the following is the definition of Frequency of a wave?

The number of waves created per second

Which one of the following is the definition of the Crest of a wave?

The highest point of a transverse wave

Which one of the following is the definition of Trough of a wave?

The lowest point of a transverse wave

Which one of the following terms is known as the distance between two consecutive highest points or lowest points of a wave?

wavelength