Checkpt 3

The greatest increase in the speed of a sound wave would result from

the transition between which two media?

• Air and Glass

• Glass and Aluminum

• Water and Iron

• Aluminum and water

During a basketball game, fans in the stands create a “wave” by standing

up from their chairs when the wave arrives at their location. Which

sentence classifies this type of wave and its particle motion?

• Its a longitudinal wave, it goes backwards and forward.

• It is a transverse wave in which the particles of the wave

  move parallel from the wavelength

• It is a transverse wave in which the particles of the wave

  move in a direction perpendicular to the wave motion.

• Its not a wave. Its actually a wavelength.

Sound does not travel in space because sound is like a vacuum in space. But light waves do travel in space. Which medium could NOT transmit a mechanical wave?

• Space

• Light

• Medium

• Vacuum

At the ballgame, the noise can get so loud. How would you describe the loudness using scientific vocabulary.

• Pitch

• Speed

• Amplitide

• Frequency

Sound waves travel through all of them but...

• Wind

• a mountain

• water

• vacuum

Noise cancelling headphones like BEATS uses what so that it cancels background noise...

• Constructive Interference

• Destructive Interference

• Cancel Interference

• Doppler Affect

Which of the following explains sound resonance?

• At a position in space, two sound waves interfere

  deconstructively and produce an absence of sound.

• At a position in space, two sound waves interfere

  constructively and produce a louder sound.

• An object’s motion towards an observer causes sound waves

  it emits to have a higher perceived frequency.

• An object vibrating at a second object’s natural frequency

  forces the second object to vibrate.

Doctors use ultrasound imaging to look at organs and other structures

within the body. The device sends high frequency waves into the body.

How is the image formed when these waves hit boundaries between

tissues?

• XRAY's are a reflection

• XRAY's are refraction

• XRAY's are dissonance

• XRAY's are absorption

Sonar equipment sends waves into deep water and measures the

• refraction of the transmitted waves.

• time delay of the reflected waves.

• direction of the transmitted waves.

• interference of the transmitted and reflected waves.

Cars have sensors. How does a car know that it may hit something ?

• the sensor reflects the distance of the car from the object.

• Understanding the waves coming off of the back of the car

• The sensor detects the distance the car is from the highway

• The sensor detects how the wheels on the car to the tar in the road.