- Which of the following is a form of mechanical wave?
a. Light
b. Sound
c. Radio waves
d. X-rays - What type of wave is sound?
a. Transverse
b. Longitudinal
c. Electromagnetic
d. Standing - Sound cannot travel through which of the following?
a. Vacuum
b. Water
c. Air
d. Solids - The speed of sound in air at room temperature is approximately:
a. 300,000 m/s
b. 343 m/s
c. 1000 m/s
d. 1500 m/s - Sound waves with higher amplitudes represent:
a. Higher pitch
b. Lower pitch
c. Louder sounds
d. Softer sounds - What is the unit of frequency?
a. Hertz (Hz)
b. Decibel (dB)
c. Meter (m)
d. Joule (J) - Which part of the ear amplifies sound vibrations?
a. Cochlea
b. Eardrum
c. Ear canal
d. Auditory nerve - The reflection of sound is commonly known as:
a. Refraction
b. Diffraction
c. Echo
d. Absorption - What is the minimum number of vibrations per second that the human ear can detect as sound?
a. 10 Hz
b. 20 Hz
c. 1000 Hz
d. 2000 Hz - Which musical instrument produces sound by the vibration of strings?
a. Trumpet
b. Drum
c. Guitar
d. Flute - In which medium does sound travel the fastest?
a. Air
b. Water
c. Steel
d. Vacuum - What is the primary purpose of a sonar device?
a. To detect earthquakes
b. To measure atmospheric pressure
c. To navigate underwater
d. To measure temperature - What is the term for the persistence of sound after the source has stopped producing it?
a. Echo
b. Refraction
c. Absorption
d. Reflection - The Doppler effect is related to which aspect of sound?
a. Pitch
b. Loudness
c. Frequency
d. Wavelength - Which property of a sound wave determines its volume or loudness?
a. Frequency
b. Amplitude
c. Wavelength
d. Velocity - When sound waves change direction as they pass through an opening, it is called:
a. Reflection
b. Refraction
c. Diffraction
d. Absorption - The speed of sound is affected by which of the following factors?
a. Temperature
b. Humidity
c. Altitude
d. All of the above - Which gas is commonly used to fill balloons to make them soundproof?
a. Oxygen
b. Helium
c. Carbon dioxide
d. Nitrogen - What is the range of frequencies that the average human ear can hear?
a. 20 Hz to 20,000 Hz
b. 10 Hz to 100 Hz
c. 1 Hz to 1,000 Hz
d. 50 Hz to 5,000 Hz - What causes the sensation of different musical notes?
a. Amplitude of sound waves
b. Frequency of sound waves
c. Wavelength of sound waves
d. Velocity of sound waves
Key