Describe what is meant by "sound." Explain how sound is created, transmitted, and sensed. Doppler Effect Interface: In the interface shown above the sound source (red box) is motionless. There are also two motionless observers (blue boxes). Assume the measurements in the interface are in meters. The tick marks between numbers are 0.2 meters each. It is common for sound waves to be shown with circles representing the wave front (the front of the compression part of the wave). Time is shown in the upper left hand corner next to the word tiempo. Use the video above (or here) to calculate the frequency (how many waves pass a given point per 1 second) for this situation. Don't forget your units! Use the tick marks to measure the wavelength of the waves present. Remember that wavelength is the length of one full wave, so in this interface it is the distance between each wave front. Don't forget your units! Use your frequency and your wavelength from the above questions to calculate the velocity of your wave using the equation v = ? x f. Don't forget your units! The Doppler Effect in Sound Now watch the video below (or here) of the interface again, but now the source (red box) is moving with a velocity of 0.50 m/s. Examine the motion of the waves. Describe how the frequency changed on each side of the source. What is the new wavelength on EACH side of the moving source? (You should have twoanswers here.) Don't forget your units. Remembering that the velocity of the wave HAS NOT changed (this means use the velocity you calculated above), use the equation v = ? x f and the wavelengths you measured above to calculate the new frequencies on EACH side of the moving source. Don't forget your units. Electromagnetic Waves and Light Describe several ways that electromagnetic waves are similar to acoustical (sound) waves. Describe several ways that electromagnetic waves and acoustical waves are different. The Doppler Shift in Light How is the Doppler shift used in astronomy? What is meant by the terms red-shift and blue-shift? Summary Radar is the process of sending out an electromagnetic wave, having it reflect off of a body (such as an airplane or a water molecule), receiving the reflected wave, and then imaging the results. How do you think the Doppler shift can be used to measure wind speeds (Doppler radar)? (Hint: Think about how radio waves might reflect off of air particles that are moving at various speeds and in various directions.) Explain why the pitch of an object approaching an observer (such as a fire truck with its siren on) differs from the pitch as it moves away from the observer. Remember that pitch is the brain's interpretation of a sound's frequency. What is the Doppler effect, and why is it important to understand?
21 questions of physics homework ( victors of work and force ) there is one graph hey there I want someone to help me with my physics homework there are 21 questions and a graph u have to draw in excel. If u don't mind i need to see the work u have done to get to the answer? so also I can understand it. The homework is belew in the attachments please read it and make sure u know how to do it. thanks and best wishes :) hrbbi
Homework Problem A design engineer submits a design to manufacturing for securing two (2) plates together for the purpose of sustaining a 2,000 pound force. The engineer claims that it will take three (3) steel 3/8-16 bolts to hold the plates together. If the design stress for sheer is 8,500 psi, is it a good idea to do this? How many bolts are required? If you chose to use rivets, how many of those would you need? Why would you choose one type of fastener over another? Please show all calculations and list all assumptions http://www.engineersedge.com/screw_threads_chart.htm
1)Imagine a superfast fish that is able to swim faster than the speed of sound in water. Would this fish produce a “sonic boom”? 2)Use the concepts from this module to explain why flying bees buzz. 3)If the handle of a tuning fork were to be handled firmly against a table, would the sound from the tuning fork change? If so, what would change? 4)The strings of a harp have different length in order to produce different notes. However, given that the strings in a guitar have all the same length, how are the different notes produced? 5)Why is it that smaller animals (like mice and birds) tend to make higher pitch sounds while bigger animals (like bears and alligators) make deeper sounds? 6) Does it make sense why a cello make lower frequency sounds than a violin? Why?
i need you to do a physics report for my collisions lab. i attached all my results and my book and the syllabus and a sample. i need you to do it the Same formula of the sample. Also i did attached the eqaution that you need.
In Fig. 29-56, four long straight wires are perpendicular to the page, and their cross sections form a square of edge length a = 6.65 cm. Each wire carries 18.7 A, and all the currents are out of the page. What is the magnitude of the net magnetic force per unit length on wire 1?
