For each labelled point, indicate whether constructive or destructive interference takes
place at that point.
A ride at the local amusement park is called "Standing on Standing Waves". Which position (a node or an antinode) on the ride would give the greatest thrill?
How many nodes and how many anti-nodes appear in the standing wave below?
For a standing wave on a string, you are given three statements:
you can have any
and any
as long as the relationship,
is satisfied.
only certain wavelengths and frequencies are allowed
the wave velocity is only dependent on the medium
Which of the statements are true:
A and C only
B and C only
A, B, and C
none of the above
Consider the diagram below of a standing wave on a string 9 m long that is tied at both ends. The wave velocity in the string is 16 m
s
. What is the wavelength?
Summary
A wave is formed when a continuous number of pulses are transmitted through a medium.
A peak is the highest point a particle in the medium rises to.
A trough is the lowest point a particle in the medium sinks to.
In a transverse wave, the particles move perpendicular to the motion of the wave.
The amplitude is the maximum distance from equilibrium position to a peak (or trough), or the maximum displacement of a particle in a wave from its position of rest.
The wavelength (
) is the distance between any two adjacent points on a wave that are in phase. It is measured in metres.
The period (
) of a wave is the time it takes a wavelength to pass a fixed point. It is measured in seconds (s).
The frequency (
) of a wave is how many waves pass a point in a second. It is measured in hertz (Hz) or
.
Frequency:
Period:
Speed:
or
.
When a wave is reflected from a fixed end, the resulting wave will move back through the medium, but will be inverted. When a wave is reflected from a free end, the waves are reflected, but not inverted.
Exercises
A standing wave is formed when:
a wave refracts due to changes in the properties of the medium
a wave reflects off a canyon wall and is heard shortly after it is formed
a wave refracts and reflects due to changes in the medium
two identical waves moving different directions along the same medium interfere
How many nodes and anti-nodes are shown in the diagram?
Draw a transverse wave that is reflected from a fixed end.
Draw a transverse wave that is reflected from a free end.
A wave travels along a string at a speed of
. If the frequency of the source of the wave is 7,5 Hz, calculate:
the wavelength of the wave
the period of the wave
Water waves crash against a seawall around the harbour. Eight waves hit the seawall in 5 s. The distance between successive troughs is 9 m. The height of the waveform trough to crest is 1,5 m.
How many complete waves are indicated in the sketch?
Write down the letters that indicate any TWO points that are:
in phase
out of phase
Represent ONE wavelength.
Calculate the amplitude of the wave.
Show that the period of the wave is 0,67 s.
Calculate the frequency of the waves.
Calculate the velocity of the waves.
Questions & Answers
I'm interested in biological psychology and cognitive psychology
Communication is effective because it allows individuals to share ideas, thoughts, and information with others.
effective communication can lead to improved outcomes in various settings, including personal relationships, business environments, and educational settings. By communicating effectively, individuals can negotiate effectively, solve problems collaboratively, and work towards common goals.
it starts up serve and return practice/assessments.it helps find voice talking therapy also assessments through relaxed conversation.
miss
Every time someone flushes a toilet in the apartment building, the person begins to jumb back automatically after hearing the flush, before the water temperature changes. Identify the types of learning, if it is classical conditioning identify the NS, UCS, CS and CR. If it is operant conditioning, identify the type of consequence positive reinforcement, negative reinforcement or punishment
nature is an hereditary factor while nurture is an environmental factor which constitute an individual personality. so if an individual's parent has a deviant behavior and was also brought up in an deviant environment, observation of the behavior and the inborn trait we make the individual deviant.
Samuel
I am taking this course because I am hoping that I could somehow learn more about my chosen field of interest and due to the fact that being a PsyD really ignites my passion as an individual the more I hope to learn about developing and literally explore the complexity of my critical thinking skills