8th Grade Chapter 4 Lesson 4 Slideshare
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The document discusses Archimedes' discovery of buoyancy and its principles. It explains that Archimedes discovered that objects float or sink based on the amount of water they displace. It also outlines Archimedes' principle of buoyancy - that the buoyant force on an object equals the weight of the fluid it displaces. Finally, it briefly describes how submarines and airships are able to control their buoyancy through changing the amount of water or air they displace.
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Archimedes' principle states that when an object is fully or partially submerged in a fluid, it experiences an upthrust equal to the weight of the fluid displaced. This principle explains why objects float or sink based on their density. If an object's density is greater than the fluid, it will sink, and if its density is less than the fluid, it will float. The upthrust force reduces the apparent weight felt by submerged objects. Archimedes' principle applies to ships, submarines, hot air balloons, and other objects interacting with fluids. It allows calculation of fluid density based on measurements of weight changes when objects are submerged.
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The document discusses floating and sinking concepts including:
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2) Archimedes' principle states the buoyant force on an object equals the weight of the fluid it displaces.
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Archimedes' Principle states that the buoyant force on an object immersed in a fluid is equal to the weight of the fluid displaced by the object. This principle explains why objects float or sink based on an object's density compared to the fluid. It also explains why objects seem lighter when submerged. Applications of Archimedes' Principle include determining the depth ships sit in water based on water temperature and density, how hot air balloons rise and fall, and how submarines control their buoyancy using ballast tanks.
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This document provides information about buoyancy and floating objects. It includes examples of calculating volume, density, and whether objects will float based on these properties. The key points are:
1) An object's volume is calculated to determine density and if it will displace enough water to float.
2) Density is the ratio of an object's mass to its volume. If the object's density is less than the density of water (1 g/mL), it will float.
3) According to Archimedes' principle, an object floats if the buoyant force pushing up equals the gravitational force pulling down. The buoyant force depends on the amount of water the object displaces.
4) Examples
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Forces Acting on Buoyancy
- The buoyant force is caused by the difference in pressure between the top and bottom of an object submerged in a fluid, with greater pressure on the bottom pushing up.
- This upward buoyant force is equal to the weight of the fluid displaced and will cause an object to float if it exceeds the object's weight.
- An object will float if the average density is less than the fluid's density, the upthrust equals the total weight, and enough volume is submerged to displace a large amount of fluid.
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The document discusses the concepts of floating and sinking. It explains that an object will float if its mass is equal to or less than the mass of water it displaces. An object floats by getting aligned with the water's streams, known as being streamlined. Upthrust is the force that pushes up on an object in water, allowing it to float if the upthrust is greater than or equal to the object's weight. The document provides examples of objects that typically float, like paper boats and fish, versus those that typically sink, like coins and nails.
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The document summarizes the first and second laws of thermodynamics. The first law states that energy cannot be created or destroyed, and heat can be converted to work and vice versa. The second law states that heat flows spontaneously from hot to cold bodies, and entropy, or disorder, increases over time as energy is dissipated.
8th Grade Chapter 5 Lesson 2
Heat can be transferred between objects in three ways: conduction, convection, and radiation. Conduction involves direct contact between objects, convection involves the transfer of heat by a fluid like air or water, and radiation transfers heat through electromagnetic waves without a medium. Materials expand when heated as the molecules move farther apart, requiring expansion joints in bridges to allow for expansion and contraction with changes in temperature. Thermostats also use bimetallic strips that expand at different rates to sense temperature changes and regulate heating and cooling systems.
More from MRS.KDUNCAN (20)
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Demystifying Knowledge Management through Storytelling
The Department of Veteran Affairs (VA) invited Taylor Paschal, Knowledge & Information Management Consultant at Enterprise Knowledge, to speak at a Knowledge Management Lunch and Learn hosted on June 12, 2024. All Office of Administration staff were invited to attend and received professional development credit for participating in the voluntary event.
The objectives of the Lunch and Learn presentation were to:
- Review what KM ‘is’ and ‘isn’t’
- Understand the value of KM and the benefits of engaging
- Define and reflect on your “what’s in it for me?”
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Leveraging the Graph for Clinical Trials and Standards
Katja Glaß
OpenStudyBuilder Community Manager - Katja Glaß Consulting
Marius Conjeaud
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Your goto partner for Oracle Cloud, PeopleSoft, E-Business Suite, and Ellucian Banner. We are a firm specialized in managed services and consulting.
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This talk will cover ScyllaDB Architecture from the cluster-level view and zoom in on data distribution and internal node architecture. In the process, we will learn the secret sauce used to get ScyllaDB's high availability and superior performance. We will also touch on the upcoming changes to ScyllaDB architecture, moving to strongly consistent metadata and tablets.
JavaLand 2024: Application Development Green Masterplan
My presentation slides I used at JavaLand 2024
Introduction of Cybersecurity with OSS at Code Europe 2024
I develop the Ruby programming language, RubyGems, and Bundler, which are package managers for Ruby. Today, I will introduce how to enhance the security of your application using open-source software (OSS) examples from Ruby and RubyGems.
The first topic is CVE (Common Vulnerabilities and Exposures). I have published CVEs many times. But what exactly is a CVE? I'll provide a basic understanding of CVEs and explain how to detect and handle vulnerabilities in OSS.
Next, let's discuss package managers. Package managers play a critical role in the OSS ecosystem. I'll explain how to manage library dependencies in your application.
I'll share insights into how the Ruby and RubyGems core team works to keep our ecosystem safe. By the end of this talk, you'll have a better understanding of how to safeguard your code.
Taking AI to the Next Level in Manufacturing.pdf
Read Taking AI to the Next Level in Manufacturing to gain insights on AI adoption in the manufacturing industry, such as:
1. How quickly AI is being implemented in manufacturing.
2. Which barriers stand in the way of AI adoption.
3. How data quality and governance form the backbone of AI.
4. Organizational processes and structures that may inhibit effective AI adoption.
6. Ideas and approaches to help build your organization's AI strategy.
Main news related to the CCS TSI 2023 (2023/1695)
An English 🇬🇧 translation of a presentation to the speech I gave about the main changes brought by CCS TSI 2023 at the biggest Czech conference on Communications and signalling systems on Railways, which was held in Clarion Hotel Olomouc from 7th to 9th November 2023 (konferenceszt.cz). Attended by around 500 participants and 200 on-line followers.
The original Czech 🇨🇿 version of the presentation can be found here: https://www.slideshare.net/slideshow/hlavni-novinky-souvisejici-s-ccs-tsi-2023-2023-1695/269688092 .
The videorecording (in Czech) from the presentation is available here: https://youtu.be/WzjJWm4IyPk?si=SImb06tuXGb30BEH .
zkStudyClub - LatticeFold: A Lattice-based Folding Scheme and its Application...
Folding is a recent technique for building efficient recursive SNARKs. Several elegant folding protocols have been proposed, such as Nova, Supernova, Hypernova, Protostar, and others. However, all of them rely on an additively homomorphic commitment scheme based on discrete log, and are therefore not post-quantum secure. In this work we present LatticeFold, the first lattice-based folding protocol based on the Module SIS problem. This folding protocol naturally leads to an efficient recursive lattice-based SNARK and an efficient PCD scheme. LatticeFold supports folding low-degree relations, such as R1CS, as well as high-degree relations, such as CCS. The key challenge is to construct a secure folding protocol that works with the Ajtai commitment scheme. The difficulty, is ensuring that extracted witnesses are low norm through many rounds of folding. We present a novel technique using the sumcheck protocol to ensure that extracted witnesses are always low norm no matter how many rounds of folding are used. Our evaluation of the final proof system suggests that it is as performant as Hypernova, while providing post-quantum security.
Paper Link: https://eprint.iacr.org/2024/257
High performance Serverless Java on AWS- GoTo Amsterdam 2024
Java is for many years one of the most popular programming languages, but it used to have hard times in the Serverless community. Java is known for its high cold start times and high memory footprint, comparing to other programming languages like Node.js and Python. In this talk I'll look at the general best practices and techniques we can use to decrease memory consumption, cold start times for Java Serverless development on AWS including GraalVM (Native Image) and AWS own offering SnapStart based on Firecracker microVM snapshot and restore and CRaC (Coordinated Restore at Checkpoint) runtime hooks. I'll also provide a lot of benchmarking on Lambda functions trying out various deployment package sizes, Lambda memory settings, Java compilation options and HTTP (a)synchronous clients and measure their impact on cold and warm start times.
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What began over 115 years ago as a supplier of precision gauges to the automotive industry has evolved into being an industry leader in the manufacture of product branding, automotive cockpit trim and decorative appliance trim. Value-added services include in-house Design, Engineering, Program Management, Test Lab and Tool Shops.
"Frontline Battles with DDoS: Best practices and Lessons Learned", Igor Ivaniuk
At this talk we will discuss DDoS protection tools and best practices, discuss network architectures and what AWS has to offer. Also, we will look into one of the largest DDoS attacks on Ukrainian infrastructure that happened in February 2022. We'll see, what techniques helped to keep the web resources available for Ukrainians and how AWS improved DDoS protection for all customers based on Ukraine experience
"Choosing proper type of scaling", Olena Syrota
Imagine an IoT processing system that is already quite mature and production-ready and for which client coverage is growing and scaling and performance aspects are life and death questions. The system has Redis, MongoDB, and stream processing based on ksqldb. In this talk, firstly, we will analyze scaling approaches and then select the proper ones for our system.
Dandelion Hashtable: beyond billion requests per second on a commodity server
This slide deck presents DLHT, a concurrent in-memory hashtable. Despite efforts to optimize hashtables, that go as far as sacrificing core functionality, state-of-the-art designs still incur multiple memory accesses per request and block request processing in three cases. First, most hashtables block while waiting for data to be retrieved from memory. Second, open-addressing designs, which represent the current state-of-the-art, either cannot free index slots on deletes or must block all requests to do so. Third, index resizes block every request until all objects are copied to the new index. Defying folklore wisdom, DLHT forgoes open-addressing and adopts a fully-featured and memory-aware closed-addressing design based on bounded cache-line-chaining. This design offers lock-free index operations and deletes that free slots instantly, (2) completes most requests with a single memory access, (3) utilizes software prefetching to hide memory latencies, and (4) employs a novel non-blocking and parallel resizing. In a commodity server and a memory-resident workload, DLHT surpasses 1.6B requests per second and provides 3.5x (12x) the throughput of the state-of-the-art closed-addressing (open-addressing) resizable hashtable on Gets (Deletes).
Connector Corner: Seamlessly power UiPath Apps, GenAI with prebuilt connectors
Join us to learn how UiPath Apps can directly and easily interact with prebuilt connectors via Integration Service--including Salesforce, ServiceNow, Open GenAI, and more.
The best part is you can achieve this without building a custom workflow! Say goodbye to the hassle of using separate automations to call APIs. By seamlessly integrating within App Studio, you can now easily streamline your workflow, while gaining direct access to our Connector Catalog of popular applications.
We’ll discuss and demo the benefits of UiPath Apps and connectors including:
Creating a compelling user experience for any software, without the limitations of APIs.
Accelerating the app creation process, saving time and effort
Enjoying high-performance CRUD (create, read, update, delete) operations, for
seamless data management.
Speakers:
Russell Alfeche, Technology Leader, RPA at qBotic and UiPath MVP
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Demystifying Knowledge Management through Storytelling
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Astute Business Solutions | Oracle Cloud Partner |
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JavaLand 2024: Application Development Green Masterplan
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Introduction of Cybersecurity with OSS at Code Europe 2024
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zkStudyClub - LatticeFold: A Lattice-based Folding Scheme and its Application...
zkStudyClub - LatticeFold: A Lattice-based Folding Scheme and its Application...
High performance Serverless Java on AWS- GoTo Amsterdam 2024
High performance Serverless Java on AWS- GoTo Amsterdam 2024
Northern Engraving | Modern Metal Trim, Nameplates and Appliance Panels
Northern Engraving | Modern Metal Trim, Nameplates and Appliance Panels
"Frontline Battles with DDoS: Best practices and Lessons Learned", Igor Ivaniuk
"Frontline Battles with DDoS: Best practices and Lessons Learned", Igor Ivaniuk
Dandelion Hashtable: beyond billion requests per second on a commodity server
Dandelion Hashtable: beyond billion requests per second on a commodity server
Connector Corner: Seamlessly power UiPath Apps, GenAI with prebuilt connectors
Connector Corner: Seamlessly power UiPath Apps, GenAI with prebuilt connectors
8th Grade Chapter 4 Lesson 4 Slideshare
- 1. Pgs. 160-164 For Student Use Only
- 2. Archimedes discovered why gases float. Archimedes discovered why certain objects will float and certain objects will sink.
- 3. Different objects displace different amount of water. Bouyancy= the tendency for an object to float when it is placed in a fluid. An object in water feels lighter and this is called bouyancy.
- 4. What is buoyant force? Archimedes principle of bouyancy: states the weight lost by an object immersed in a fluid is equal to the weight of the fluid displaced