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Wave Lab Guide

Pre-Lab

Explore https://phet.colorado.edu/sims/html/wave-on-a-string/latest/wave-on-a-string_en.html

Post your questions or findings through https://docs.google.com/forms/d/e/1FAIpQLSerE8kZX8n3vkyxwGcUD4jxvX-0jKDqwnx3cskKi8WEu6bw5A/viewform?usp=sf_link

Lab Objective

Measure the properties of the wave and find the relationships

Lab Setup

Initial Setup:

  1. Go to https://phet.colorado.edu/sims/html/wave-on-a-string/latest/wave-on-a-string_en.html
  2. Select Oscillate, No End, Slow Motion in the simulator
  3. Set Amplitude to 0.50cm, Frequency to 1.5Hz, Damping to None,  Tension to High
  4. Check Rulers, Timer, and Reference Line

Data to collect

  • the maximum displacement(the distance between the peak and the orange line) a particle oscillates from the center(Hint: pause the wave and move the reference line to the peak of the wave)
  • the time one green particle finish a complete oscillation(Hint: recall in the previous lab, we measured 10 circles and divide the total time by 10 to make it more precise)

Lab Measurement and Data Collection

Experiment #1 How will the wave change if the amplitude change?

Column A B C D E
# of Trial Amplitude (unit:cm) __________ the maximum displacement (Unit:cm) Frequency(Unit:Hz) The time one green particle finish 10 complete oscillation (Unit:sec) ___________ The average time one green particl finish 1 complete oscillation
1 0.25   1.50    
2 0.50   1.50    
3 0.75   1.50    
4 1.00   1.50    
5 1.25   1.50    

Experiment #2 How will the wave change if the Frequency change?

Column A C D E F
# of Trial Amplitude (unit:cm) Frequency(Unit:Hz) The time one green particle finish 10 complete oscillation (Unit:sec) ___________ The average time one green particl finish 1 complete oscillation __________ C x F
1 0.50 1.00      
2 0.50 1.25      
3 0.50 1.50      
4 0.50 1.75      
5 0.50 2.00      
Explanation
Reading MaterialDownload
Concepts
https://www.ducksters.com/science/physics/properties_of_waves.php
https://www.ducksters.com/science/physics/properties_of_waves.php
http://csc4waves.weebly.com/longitudinal-waves.html
Definition Symbol Unit Formula
Amplitude the distance between a line through the middle of a wave and a crest or trough. A m N/A
Frequency how many waves pass a point in a certain amount of time f Hz, s-1 f =1/T
Period the amount of time for the wave to repeat itself T s T= 1/f
Wavelength the distance from the crest on one wave to the crest on the very next wave λ m λ = v/f = vT
Speed the distance a wave travels in an amount of time v m/s v = λf = λ/T
References

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Community Resource Map

Community Resource Map

Community Resources

Community ResourceInformation and Description
South Central Los Angeles Regional Center
Website: https://sclarc.org/
Contact:
2500 S. Western Avenue, Los Angeles, CA 90018
(213) 744-7000

SCLARC is a regional non-profit organization that serves community members and families with “intellectual disabilities, cerebral palsy, autism, epilepsy and other similar disabilities(South Central Los Angeles Regional Center, n.d., para. 1-2).” It provides services including behavior intervention, Clinical Services, and Lanterman act services. The parent resource center also provides essential supports for parents to build the capacities together to better support the children with special needs.
Equality California Los Angeles Headquarter
Website: https://www.eqca.org/
Contact:
Los Angeles Headquarters
3701 Wilshire Blvd, Suite 725, Los Angeles, CA 90010
(323) 848-9801		Equality California connects and advocates LGBTQ members across the states. The organization supports LGBTQ communities in civil rights, addressing discriminations, healthcare, and promoting equality in public education(Equality California, n.d.).
Los Angeles County Department of Education – Regional Office – Metro North
Website: https://www.lacoe.edu/Student-Services/Foster-Youth-Services
Contact:
Howard Adelman – Counselor/Ed Liaison
Adelman_Howard@lacoe.edu
1933 S. Broadway, Los Angeles, CA, 90007
(213) 763-1440		The LACOE has developed several programs to support students with special needs. The LACOE provides Foster Youth Services Coordination Program to support students in foster care or on probation, Health Outreach Program to provide socioeconomically disadvantaged students basic healthcare, Homeless Program attending to homeless students(Los Angeles County Department of Education, n.d.).
1736 Family Crisis Center
Website: http://www.1736familycrisiscenter.org
Contact:
2116 Arlington Avenue Suite 200, Los Angeles, CA 90018
(323) 737-3900		1736 Family Crisis Center provides free programs for victims suffering from domestic violence, homeless youth and adults, and other low-income community members. Programs are Emergency Youth Shelter “open to any runaway, homeless, or throwaway teenager (ages 10-17),” domestic violence program open to domestic violence victims and their children, community service center programs offering mental health therapy, job development, and legal support (1736 Family Crisis Center, n.d.).
Wellnest Emotional Health & Wellness
Website: https://www.wellnestla.org/
Contact:
University Park Office Administrative Offices
3031 South Vermont Avenue, Los Angeles, CA 90007
(323)373-2400		Wellnest Emotional Health & Wellness is previously named as Formerly known as the Los Angeles Child Guidance Clinic. It offers mental health consulting for children, youth, young adults(up to 25) and their families by addressing trauma, stabilizing families, behavior intervention, etc.
West Adams Preparation High School Parent Center
Contact:
Diana Quiroga
diana.quiroga@lausd.net
(323)373-2126		Parent Center supports parents and students to build their capacities to succeed in school and “preserve their roots”. The parent center facilitates the training of parent portal, Language programs, how to develop math skills at home, and lectures on Socratic Seminar(Quiroga, Personal Interview, January 21, 2020). They also refer students and parents to the outside community resources when needed.

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