PA Physics home work

Sound test questions 1 What type of waves are sound waves? Light Transverse Longitudinal 2 Which do sound waves travel fastest through? Solid Gas Liquid 3 What are the areas where particles are pulled further apart in sound waves called? Compression Vacuum Rarefaction 4 What is the name given to the range above human hearing? Infrasound Ultrasound Infrared 5 What is the speed of sound in air? 300 000 km/s 340 m/s 340 miles per hour 6 Which of these is the correct order for the speed of waves starting with the fastest? Sound, light, water Light, water, sound Light, sound, water 7 Which of these is the correct equation for speed? speed = distance ÷ time speed = distance × time distance = speed × time 8 Where is SONAR used? In hospitals to find broken bones In fishing boats to find fish In hospitals to look at unborn babies 9 What are the units of frequenc...

PAPhysicsScience Engineering Physics Questions and Answers – Sounds and Waves – 1 This set of Engineering Physics Multiple Choice Questions & Answers (MCQs) focuses on “Sounds and Waves – 1”. 1. Statement: Ocean waves hitting a beach are always found to be nearly normal to the shore. Reason: Once waves hitting a beach are assumed to be plane waves. a) Both statement and reason are true and the reason is the correct explanation of the statement b) Both statement and reason are true but the reason is not the correct explanation of the statement c) Statement is true but the reason is false d) Both statement and reason are false View Answer Answer: a Explanation: Both the statement and reason are true. Once waves are transverse in nature, they hit the shore normally. As these waves spread out, their radius of curvature becomes so large that they may be considered as plane waves. 2. Statement: When a beetle moves along the sand within a few tens of centimetres of a...

Work, Energy, & Power in Physics: Homework Help Chapter Exam Work, Energy, & Power in Physics: Homework Help  /  Practice Exam Exam Instructions: Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck! Answered  0 of 30   questions 18:47  Hide timer  Go To First Skipped Question    Restart Exam Page 1 1. Which best describes work? The force on an object divided by the distance the object is moved The pressure on an object times the distance the object is moved The force on an object times the distance the object is moved The length of time it takes to lift an object in the air The pressure over a given ar...

WORK AND ENERGY Amatory Siahaan 08.31 (Diedit 10.08) Work and energy PAPhysicsScience ( Material of Physics Monthly test ) Energy gives us one more tool to use to analyze physical situations. When forces and accelerations are used, you usually freeze the action at a particular instant in time, draw a free-body diagram, set up force equations, figure out accelerations, etc. With energy the approach is usually a little different. Often you can look at the starting conditions (initial speed and height, for instance) and the final conditions (final speed and height), and not have to worry about what happens in between. The initial and final information can often tell you all you need to know. Work and energy Whenever a force is applied to an object, causing the object to move, work is done by the force. If a force is applied but the object doesn't move, no work is done; if a force is applied and the object moves a distance d in a direction other than the directi...

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PAPhysicsScience What Is SONAR?   Akash Peshin     14 Mar 2018 (Updated: 16 Oct 2019) SONAR is a technique that uses sound waves to map or locate objects in the surrounding environment. The premise is quite simple: first, emit a cluster of sound waves in the direction of an object. While a few waves will bounce off it, the remaining waves will be reflected back in the direction of the emitter. If you were to insert one end of a tube into an enormous sea and put an ear to the other, you would definitely look like a loon. However, you would also hear the faint groaning of ships and the singing of various animals far away in the vast depths of the ocean. Leonardo Da Vinci was the first person to perform this ingenious experiment (without the fear of being judged) and discovered this whimsical phenomenon. He had successfully implemented what we now call SONAR. Sound Navigation And Ranging SONAR is a technique that uses sound waves to map or locate ...