HESI A2 VERSION 1
READING COMPEHENSION
Doppler Effect
Have you ever wondered why the whistle of a traveling, distant locomotive predicts its approach
several yards before anyone actually sees it? Or why an oncoming ambulance’s screaming siren
is heard momentarily several feet before the ambulance comes into full view, before it passes
you, and why its siren is still heard faintly well after the ambulance is out of sight?
What you are witnessing is a scientific phenomenon known as the Doppler Effect. What takes
place is truly remarkable. In both of these instances, when the train or ambulance moves toward
the sound waves in front of it, the sound waves are pulled closer together and have a higher
frequency. In either instance, the listener positioned in front of the moving object hears a higher
pitch. The ambulance and locomotive are progressively moving away from the sound waves
behind them, causing the waves to be farther apart and to have a lower frequency. These fastapproaching modes of transportation distance themselves past the listener, who hears a lower
pitch.
1. Which statement is not listed as a detail in the passage?
A. The oncoming sound waves have a higher pitch because of high frequency and closeness
of waves.
B. The oncoming sound waves have a higher pitch because of low frequency and closeness
of waves.
C. The whistling sound of the locomotive as it approaches and passes can be explained by
the Doppler effect.
D. The high-pitched sound of the ambulance as it approaches and passes can be explained
by the Doppler effect.
2. What is the main idea of the passage?
A. Trains and ambulances make distinctly loud noises.
B. Low-frequency waves make high-pitched sounds.
C. High-frequency waves make low-pitched sounds.
D. The Doppler Effect explains the rationale for why sound is heard initially more strongly
and then faintly after a moving object has passed.
3. What is the meaning of the word phenomenon in the secon
Want to pass your exams with flying colors? There are effective strategies to achieve your academic goals. Explore a wealth of resources including exams, notes, case studies, test banks, and more right here. Remember, acknowledging what you don't know is the first step towards mastering it. Wishing you success in your studies! Feel free to reach out if you require further assistance.
anatomy array as an abstract data type in data structures ati teas 7 math b pharm business & management cdfm - module 3 computer computer science english english communication skill financial law french hesi a2 reading maths mba molecular biology morphology morphology, syntax and semantics practice worksheet: synthetic division revolutionizing commerce comprehensive marketing solutions science stylistics and literary techniques teas english and language usage test bank bates’ guide to physical examination and history taking 13th edition bickley writing
Bespaart héél veel opzoekwerk en stress ook zeer overzichtelijk en gebruiksvriendelijk.
Super handig, echt een goeie site. Ik ga dit in de toekomst vaker gebruiken!
Deze site is een uitkomst als samenvatten niet je sterkste punt is. Zeker als je moet leren voor toetsen kun je hier alle nodige info vinden. Win-win.
Knoowy is heel handig om te gebruiken en je vind snel het materiaal dat je nodig hebt.
Knoowy is handig voor tijdens de examens en biedt hulp bij tijdsnood. Heel gemakkelijk!
Ik verkoop samenvattingen om andere studenten te helpen en tegelijk wat bij te verdienen.
Zeker de moeite als je een groot vak op het nippertje niet helemaal rond zou krijgen.
Knoowy is zeker aan te raden. Het is goedkoper dan andere platforms.