Question 1: Define pitch in the context of sound waves.

Answer: Pitch refers to how high or low a sound is, which is determined by the frequency of the sound wave.

Question 2: Explain the relationship between frequency and pitch.

Answer: Higher frequency waves produce higher pitch sounds, while lower frequency waves produce lower pitch sounds.

Question 1: A sound wave travels 340 meters in 1 second in air. Calculate the speed of sound in meters per second.

Answer: Speed = Distance / Time = 340 m / 1 s = 340 m/s

Question 2: If the speed of sound in water is approximately 1482 m/s, how long does it take for sound to travel 2964 meters in water?

Answer: Time = Distance / Speed = 2964 m / 1482 m/s = 2 seconds

Question 1: Describe a simple experiment to measure the speed of sound in air. Include variables that need to be controlled.

Answer: One possible experiment involves sending a sound pulse over a known distance and measuring the time it takes to travel that distance using a stopwatch. Variables to control include the distance, environmental noise, and temperature to ensure accurate measurements.

Question 2: List two safety precautions to consider when conducting sound experiments involving loud noises.

Answer: Use ear protection such as earplugs or earmuffs; conduct experiments in a controlled environment to prevent hearing damage.

Question 1: A scientist measures the frequency of a sound wave as 440 Hz in air. What is the pitch of this sound, and how does it compare to the musical note A4?

Answer: The pitch is high because the frequency is relatively high; it corresponds to the musical note A4, which has a frequency of 440 Hz.

Question 2: A loudspeaker produces a sound with a decibel level of 85 dB. How does this loudness compare to normal conversation (approximately 60 dB)?

Answer: The sound is louder than normal conversation because 85 dB is higher than 60 dB, indicating a higher intensity of sound.

Question 3: Given that the speed of sound in steel is approximately 5960 m/s, explain whether sound travels faster or slower in steel compared to air and justify your answer.

Answer: Sound travels much faster in steel than in air because the speed of sound in steel (5960 m/s) is significantly higher than in air (approximately 340 m/s), due to the denser and more elastic nature of steel which facilitates quicker transmission of sound waves.

Question 1: Explain how ultrasound technology uses the properties of sound to create images for medical diagnosis.

Answer: Ultrasound uses high-frequency sound waves that travel through the body; echoes are received when these waves bounce back from tissues, allowing the creation of images based on the time delay and intensity of the reflected sound.

Question 2: Identify a day-to-day example where understanding the properties of sound improves safety or efficiency.

Answer: Using sonar in submarines to detect objects underwater relies on understanding sound propagation, which enhances safety and navigation.