Wave Properties
Matter a wave travels through
Medium
Is the distance beetween the crest and the resting point
Amplitude
When a wave that bounces off a medium because it cannot pass it
a) Reflection
b) Diffraction
c) Refraction
d) Absorption
a) Reflection
Sound waves need a medium to travel, therefore they are:
Mechanical waves
Order the sources of information from the least to the most reliable:
Books and Journals - Magazines and newspapers - Youtube - Wikipedia
Youtube - Wikipedia - Magazines and newspapers -Books and Journals
Is the abscence of matter
Is the number of times a wave repeats in a given point
Frequency
When a wave changes its angle of direction
a) Reflection
b) Diffraction
c) Refraction
d) Absorption
c) Refraction
The fixed value of sound (speed of sound) traveling on air is:
343 m/s
A background must contain:
a) Base concepts and information related to a project
b) Specific information about a scientific problem
c) a Broad statement that describes the problem
d) All of the previous are correct
d) All of the previous are correct
A ________ wave ________ a medium to travel
a) Mechanical, doesn't need
b) Electromagnetic, needs
c) Electromagnetic, doesn't
c) Electromagnetic, doesn't
Is the distance from crest to crest or from through to through...
Wavelenght
When a wave gets bended or spread because of a barrier
a) Reflection
b) Diffraction
c) Refraction
d) Absorption
b) Diffraction
An "Echo" is a phenomenom that occurs when:
a) A sound wave is absorbed by a rough medium
b) A sound wave is reflected by a rough medium
c) A sound wave is reflected by a smooth medium
d) A sound wave that is absorbed by a smooth medium
c) A sound wave is reflected by a smooth medium
It is a characteristic of an information source that increases its reliability at the maximum level
a) The information has an author
b) The information is cross checked by the internet sources
c) The information is peer reviewed
c) The information is peer reviewed
A longitudinal wave travels perpendicular to the source of motion
True or False
False. A longitudinal wave travels parallel
Find the right relation for each wave property with its correct unit of measurement
a) Speed-m/s, Frequency-Db, Loudness-Hz, Wavelenght-m
b) Speed-m/s, Frequency-Hz, Loudness-Db, Wavelenght-m
c) Speed-Db, Frequency-m, Loudness-m/s, Wavelenght-Hz
b) Speed-m/s, Frequency-Hz, Loudness-Db, Wavelenght-m
A _________ is an interference that occurs when two waves have ____________
a) Destructive - Equal amplitudes
b) Destructive - Different amplitudes
c) Constructive - Equal amplitudes
a) Destructive - Equal amplitudes
In terms of stifness affecting the speed of sound, sound travels _______ on solids and _______ on gases
a) Slower - Faster
b) Faster - Slower
b) Faster - Slower
Is something that decreases the reliability of a source:
a) Its contents are cross checked by other authors
b) The biases by NGO or political associations
c) The technicallity of the writting style
b) The biases by NGO or political associations
A surface wave is:
a) A wave that travels parallel to the source of vibration
b) A wave that travels both parallel and perpendicular to the source of vibration
c) A wave that travels perpendicular to the source of motion
b) A wave that travels both parallel and perpendicular to the source of vibration
Given the formula:
Wave Speed = Wavelenght x Frequency
Calculate the Frequency of a wave that travels at 4 m/s with 8 m of wavelenght
0.5 Hz
Two ocean waves interact and overlap. The first wave has an amplitude of 2 m and the second wave has an amplitude of 1 m.... What is the most likely outcome?
a) Both waves cancel their amplitude to zero meters
b) Both waves increase their amplitude to a total of 3 meters
c) Both waves increase their amplitude to a total of 4 meters
b) Both waves increase their amplitude to a total of 3 meters
As you increase the sound loudness from 10 to 40 dB, the power of the sound increases:
a) 100 times
b) 10 times
c) 1000 times
c) 1000 times