WorksheetsWaves Quiz 2
Total questions: 22
Worksheet time: 4hrs 40mins
Why does sound travel faster in solids than gases?
It doesn't
The atoms are closer together in solids and can transfer energy more efficiently
There is less resistance in gases than solids
The atoms in solids are larger than gases
Which two factors affect the speed of sound in air?
Frequency and temperature
Pressure and wavelength
Temperature and pressure
Calculate the speed of sound in air on a 35 oC day.
331.55 m/s
308.55 m/s
330 m/s
355.45 m/s
The speed of sound in air is 340 m/s. Calculate the temperature.
5.5 o C
12 o C
300 o C
21
True or False: Pressure waves are longitudinal waves.
True
False
An aircraft reaches 370 m/s in an area in which the speed of sound is 343m/s - calculate the aircraft’s Mach number.
126910
1.08
.92
27
Convert 560 mph to m/s.
(1 mile = 1609m)
(1 hr = 3600 sec)
.155 m/s
348 m/s
250 m/s
205 m/s
If Sound B is 1000 times the intensity of Sound A, then it’s decibel level is ______ higher.
20 dB
30 db
100 dB
10 dB
True or False: A wave with a higher frequency will produce a lower sound.
True
False
A train is moving at 25 m/s towards Mrs. Lauer who is standing in the middle of the tracks. The speed of sound is 343 m/s. What frequency does Mrs. Lauer hear if the train horn has a frequency of 1000 Hz?
1079 Hz
932 Hz
79 Hz
1007 Hz
What is the name for sounds that are above 20,000 Hz?
Ultrasonic
Infrasonic
Radiosonic
What is the smallest bone in the human body?
Pinna
Stirrup
Tympanic oculus
The _______ contains over 20,000 fine hairs.
Pinna
Tympanic membrane
Cochlea
Calculate the decibel level of a lawnmower that has an intensity of 3.65x10-3 W/m2.
1 x10 -12 W/m2
-96 dB
96 dB
63 dB
How are the amplitude and the energy of a wave related?
They are inverses of one another
The energy is proportional to the amplitude
The energy is proportional to the amplitude squared.
What is the threshold of human hearing in W/m2?
1x10-11
1x10-12
1x10-13
0
What is the intensity of a sound wave produced by a trombone at a distance of 4 meter when the power output of the instrument is 6.4W? Assume the sound waves are spherical.
32 dB
.65 W/m2
.032 W/m2
65 dB
An ambulance moves away from your house with a siren that has a frequency of 950 Hz. The temperature is 25℃ and the ambulance is moving at a speed of 45 miles per hour. Calculate the frequency you hear as it drives away.
Hint: There are lots of steps to this problem, take your time!
(1 mile = 1609 meters)
(1 hr = 3600 secs)
1008 Hz
1091 Hz
890 Hz
841 Hz
How are intensity and the distance of the sound source related?
They are directly proportional
They have no connection to one another
They are inversely proportional
The intensity is inversely proportional to the distance squared
Natural frequency is best described as
the frequency at which an object naturally vibrates at when it is disturbed
a vibration that can be heard in the wild
the radio frequency that astronauts naturally use when travelling into space
the material used to make a swing
A car has two horns, one emitting a frequency of 199 Hz and the other emitting a frequency of 203 Hz. What beat frequency will they produce?
4 Hz
204 Hz
402 Hz
