A Chamber That Can Be Filled with Different Gases Has

question 38

Multiple Choice

A chamber that can be filled with different gases has placed in it a source of sound that in air produces a frequency of 200 Hz and a microphone to pick up the sound for frequency analysis.First the chamber is filled with helium (speed of sound 1 000 m/s at room conditions) ,then the helium is replaced with oxygen (speed of sound 330 m/s at room conditions) ,and then finally the helium is replaced with carbon dioxide (speed of sound 269 m/s at room conditions) .In which gas is the highest frequency of sound found by the microphone during this experiment?

• A)helium
• B)oxygen
• C)carbon dioxide
• D)They all have the same frequency of sound.