Plato Edmentum End of Semester Test Geometry BExam|
Questions and Verified Answers | 100% Correct | Grade A+
Which explanation best describes a wave? - Answer a
disturbance that travels through a medium with a transfer of
energy and without a transfer of matter
Which type of wave cannot travel in a vacuum? - Answer
sound wave
The period of the musical node E0 is 4.85 × 10-2 seconds.
What is the frequency of this note? - Answer 20.6 hertz
How are period and frequency related to each other? - Answer
Period is the reciprocal of frequency.
A sound wave enters a new medium where sound travels
faster. How does this affect the frequency and wavelength of
the sound? - Answer The frequency stays the same and the
wavelength increases.
, A sound wave in the air has a frequency of 256 hertz and is
traveling at a speed of 331 meters/second. What is its
wavelength? - Answer 1.29 meters
According to the law of reflection, what is the relationship
between the angle of incidence and the angle of reflection? -
Answer The angle of reflection is equal to the angle of
incidence.
What happens to the amplitude of the resultant wave when
two sound waves with equal amplitude constructively
interfere? - Answer It is twice than the amplitude of each
wave.
Jenny and Fred both play a long note on their trombones. A
stationary observer hears the sound increasing and decreasing
repeatedly in loudness. Which of these must be true? -
Answer The sound waves from the two trombones have
slightly different frequencies.
Priscilla is driving her car on a busy street and Harvey passes
her on his motorcycle. What will happen to the sound from his
Questions and Verified Answers | 100% Correct | Grade A+
Which explanation best describes a wave? - Answer a
disturbance that travels through a medium with a transfer of
energy and without a transfer of matter
Which type of wave cannot travel in a vacuum? - Answer
sound wave
The period of the musical node E0 is 4.85 × 10-2 seconds.
What is the frequency of this note? - Answer 20.6 hertz
How are period and frequency related to each other? - Answer
Period is the reciprocal of frequency.
A sound wave enters a new medium where sound travels
faster. How does this affect the frequency and wavelength of
the sound? - Answer The frequency stays the same and the
wavelength increases.
, A sound wave in the air has a frequency of 256 hertz and is
traveling at a speed of 331 meters/second. What is its
wavelength? - Answer 1.29 meters
According to the law of reflection, what is the relationship
between the angle of incidence and the angle of reflection? -
Answer The angle of reflection is equal to the angle of
incidence.
What happens to the amplitude of the resultant wave when
two sound waves with equal amplitude constructively
interfere? - Answer It is twice than the amplitude of each
wave.
Jenny and Fred both play a long note on their trombones. A
stationary observer hears the sound increasing and decreasing
repeatedly in loudness. Which of these must be true? -
Answer The sound waves from the two trombones have
slightly different frequencies.
Priscilla is driving her car on a busy street and Harvey passes
her on his motorcycle. What will happen to the sound from his
