Sound waves in different mediums
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An indie rock band wants to hold an outdoor concert but cannot afford high-powered speakers. Using their physics knowledge, they consider whether playing underwater would allow them to reach the same sound level over 60 meters but require less power. Calculations show that to reach 125 decibels at 60 meters would require 3.16 watts per square meter in air but just 0.00000212 watts per square meter underwater. Therefore, playing underwater is a better option.
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5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
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Dutch Power Event
“AI – Navigeren naar de toekomst?”
Op 28 mei 2024 bij Info Support.
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This presentation by OECD, OECD Secretariat, was made during the discussion “Artificial Intelligence, Data and Competition” held at the 143rd meeting of the OECD Competition Committee on 12 June 2024. More papers and presentations on the topic can be found at oe.cd/aicomp.
This presentation was uploaded with the author’s consent.
Carrer goals.pptx and their importance in real life
Career goals serve as a roadmap for individuals, guiding them toward achieving long-term professional aspirations and personal fulfillment. Establishing clear career goals enables professionals to focus their efforts on developing specific skills, gaining relevant experience, and making strategic decisions that align with their desired career trajectory. By setting both short-term and long-term objectives, individuals can systematically track their progress, make necessary adjustments, and stay motivated. Short-term goals often include acquiring new qualifications, mastering particular competencies, or securing a specific role, while long-term goals might encompass reaching executive positions, becoming industry experts, or launching entrepreneurial ventures.
Moreover, having well-defined career goals fosters a sense of purpose and direction, enhancing job satisfaction and overall productivity. It encourages continuous learning and adaptation, as professionals remain attuned to industry trends and evolving job market demands. Career goals also facilitate better time management and resource allocation, as individuals prioritize tasks and opportunities that advance their professional growth. In addition, articulating career goals can aid in networking and mentorship, as it allows individuals to communicate their aspirations clearly to potential mentors, colleagues, and employers, thereby opening doors to valuable guidance and support. Ultimately, career goals are integral to personal and professional development, driving individuals toward sustained success and fulfillment in their chosen fields.
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Presentation slides from XP2024 conference, Bolzano IT. The slides describe a new view to leadership and combines it with anthro-complexity (aka cynefin).
Artificial Intelligence, Data and Competition – ČORBA – June 2024 OECD discus...
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This presentation by Juraj Čorba, Chair of OECD Working Party on Artificial Intelligence Governance (AIGO), was made during the discussion “Artificial Intelligence, Data and Competition” held at the 143rd meeting of the OECD Competition Committee on 12 June 2024. More papers and presentations on the topic can be found at oe.cd/aicomp.
This presentation was uploaded with the author’s consent.
Presentatie 8. Joost van der Linde & Daniel Anderton - Eliq 28 mei 2024
Dutch Power Event
“AI – Navigeren naar de toekomst?”
Op 28 mei 2024 bij Info Support.
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This session will use Dave Gray’s Empathy Mapping, Argyris’ Ladder of Inference and The Four Rs from Agile Conversations (Squirrel and Fredrick).
Abstract:
Let’s talk about powerful conversations! We all know how to lead a constructive conversation, right? Then why is it so difficult to have those conversations with people at work, especially those in powerful positions that show resistance to change?
Learning to control and direct conversations takes understanding and practice.
We can combine our innate empathy with our analytical skills to gain a deeper understanding of complex situations at work. Join this session to learn how to prepare for difficult conversations and how to improve our agile conversations in order to be more influential without power. We will use Dave Gray’s Empathy Mapping, Argyris’ Ladder of Inference and The Four Rs from Agile Conversations (Squirrel and Fredrick).
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Come learn more on how to become a real influencer!
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This presentation by OECD, OECD Secretariat, was made during the discussion “Pro-competitive Industrial Policy” held at the 143rd meeting of the OECD Competition Committee on 12 June 2024. More papers and presentations on the topic can be found at oe.cd/pcip.
This presentation was uploaded with the author’s consent.
Mastering the Concepts Tested in the Databricks Certified Data Engineer Assoc...
• For a full set of 760+ questions. Go to
https://skillcertpro.com/product/databricks-certified-data-engineer-associate-exam-questions/
• SkillCertPro offers detailed explanations to each question which helps to understand the concepts better.
• It is recommended to score above 85% in SkillCertPro exams before attempting a real exam.
• SkillCertPro updates exam questions every 2 weeks.
• You will get life time access and life time free updates
• SkillCertPro assures 100% pass guarantee in first attempt.
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This presentation was uploaded with the author’s consent.
Competition and Regulation in Professions and Occupations – OECD – June 2024 ...
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This presentation by OECD, OECD Secretariat, was made during the discussion “Competition and Regulation in Professions and Occupations” held at the 77th meeting of the OECD Working Party No. 2 on Competition and Regulation on 10 June 2024. More papers and presentations on the topic can be found at oe.cd/crps.
This presentation was uploaded with the author’s consent.
Collapsing Narratives: Exploring Non-Linearity • a micro report by Rosie Wells
Insight: In a landscape where traditional narrative structures are giving way to fragmented and non-linear forms of storytelling, there lies immense potential for creativity and exploration.
'Collapsing Narratives: Exploring Non-Linearity' is a micro report from Rosie Wells.
Rosie Wells is an Arts & Cultural Strategist uniquely positioned at the intersection of grassroots and mainstream storytelling.
Their work is focused on developing meaningful and lasting connections that can drive social change.
Please download this presentation to enjoy the hyperlinks!
2024-05-30_meetup_devops_aix-marseille.pdf
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Sujets: platform engineering / terragrunt / test containers
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Sound waves in different mediums
- 1. Sound waves in different mediums
- 2. Reference Intensities: Water: 6.7x10-19 W/m2 Air: 10-12 W/m2
- 3. Question An Indie rock group wants to host a concert for its myriad fans but lacks the funding for electricity to power large, power-draining 125 decibel speakers. Being former students of Physics 101, they decide to determine whether playing underwater will allow them to deliver the same sound but with lower power output.
- 4. They are expecting a turnout that will result in the furthest people being at 60m from the stage. Is it better for them to play underwater or on the surface?
- 5. Hints - You are given the reference intensity of both water and air. What formula should you use? - You are given the desired decibel output, is this information important? - You can use the logarithmic decibel equation to solve this problem. 𝛽 = 0 𝑑𝐵 + 10log( 𝐼 𝐼0 )
- 6. Solution for air: • 125 𝑑𝐵 = 0 𝑑𝐵 + 10 log 𝐼 10−12 𝑊 𝑚2 • 12.5 𝑑𝐵 = log 𝐼 10−12 𝑊 𝑚2 • 1012.5 = 𝐼 10−12 𝑊 𝑚2 • 1012.5 𝑥 10−12 = 𝐼 • 100.5 = 𝐼 • 𝐼 = 3.16 𝑊/𝑚2 Insert the numbers into the equation Put both sides to the power of ten to eliminate the log Using the properties of exponents solve for the value, and use a calculator the determine the number
- 7. Solution for water • 125 𝑑𝐵 = 0 𝑑𝐵 + 10 log 𝐼 6.7𝑥10−19 𝑊 𝑚2 • 12.5 𝑑𝐵 = log 𝐼 6.7𝑥10−19 𝑊 𝑚2 • 1012.5 = 𝐼 6.7𝑥10−19 𝑊 𝑚2 • 1012.5 𝑥 6.7𝑥10−19 = 𝐼 • 𝐼 = 0.00000212 𝑊/𝑚2 Insert the numbers into the equation Put both sides to the power of ten to eliminate the log use a calculator the determine the number
- 8. Conclusion It is much better to play underwater as the average power output will need to be 0.00000212 W/m2 compared to air’s 3.16 𝑊/ 𝑚2 Bonus: If the band can only afford 8W of electricity how far will their sound reach if the efficiency of speakers is 1%?
- 9. Bonus Solution - 𝑃 = 𝐼4𝜋𝑟2 - P=8x0.01 - 0.08 𝑊 = (0.00000212 𝑊/𝑚2 )4𝜋𝑟2 - 0.08𝑊 0.00000212 𝑊 𝑚2 4𝜋 = 𝑟2 - 3002.9𝑚2 = 𝑟 - r = 54.8 m The equation for distance of a sound wave Only 1% of the power of the speaker is transmitted as sound Plug in the numbers, and solve They can project sound to a total distance of 54.8 m
- 10. Works Cited • http://www.privateline.com/TelephoneHistory /speech.jpg • http://www.submarineboat.com/images/rov/ sound%20path.jpg • http://p4cdn4static.sharpschool.com/UserFile s/Servers/Server_91869/Image/Band4.jpg