# Q2 - Quiz 2 Physics 1C Name MULTIPLE CHOICE Choose the one...

This preview shows pages 1–2. Sign up to view the full content.

Quiz 2 - Physics 1C Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A train passes a passenger platform at a constant speed of 25 m/s while sounding its horn (frequency=400 Hz). What overall change in frequency is detected by a person standing on the platform as the train moves from approaching to receding? Assume that the speed of sound is 330 m/s. A) 61 Hz drop B) 75 Hz drop C) 75 Hz increase D) 25 Hz drop E) None of the above 1) 2) The area of a typical eardrum is about 5.0 ˛ 10 -5 m 2 . Calculate the sound power (the energy per second) incident on the eardrum due to a lawn mower if the sound intensity is 100 dB (meaning 10 10 times more intense than the sound intensity at the threshold of hearing, which is 1.0 ˛ 10 -12 W/m 2 ). A) 5.0 ˛ 10 -5 W B) 5.0 ˛ 10 -6 W C) 5.0 ˛ 10 -7 W D) 5.0 ˛ 10 -8 W E) None of the above 2)

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 4

Q2 - Quiz 2 Physics 1C Name MULTIPLE CHOICE Choose the one...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online