Physics Lab 11 (1)

Grade 10 P1 September 2021 Physical Sciences Amathole East District QUESTION 1 (Multiple cholcs questions) Various options have been provided as possible answers to the following questions. Choose the answer and write only the letter (A - D) next to the question numbers (1.1 to 1.5) 1.1 Wavelength divided by period is... A Frequency IAmplitude C Wave spoed D Distance wave, the particles oscillate in the parallel 1.2. In a lan direction to the wave direction A Transverse B Electromagnetic C Water D Longitudinal 1.3 A lost boy cries out for help next to the cliff and the echo of his voice took 3 from the cliff to returm to him, the boy was at a distance of A 1029m 3 343m C 514.5m D 331m

3 Wave properties A sinusoidal wave, graphed above at time t = 0 seconds, travels right with velocity 8.0 m/s. Being sure to specify units... t = 0 y v = 8 m/s -7 m Problem 3.1. What is this wave's amplitude ym? Problem 3.2. What is its wavelength \? Problem 3.3. What is its wavenumber k? 5 m x

Calculate the wavelengths in air at 20°C for sounds in the maximum range of human hearing. The speed of sound in air is 343 m/s. Part A Calculate the wavelength of a 20-Hz wave. Express your answer to two significant figures and include the appropriate units. Alow = Submit Part B Ti μA Value Request Answer Units ΜΑ ? Calculate the wavelength of a 20,000-Hz wave. Express your answer to two significant figures and include the appropriate units. ?

Observational experiment: Interactions of wave pulses Here, we'll explore what happens when two waves encounter each other in the same medium. 1. Observe and describe what happens when two pulses (coming from opposite directions) meet. Make sure your description is as detailed as possible, including: What happens to the wavelength of the wave that results when two waves of equal wavelength overlap? And, what happens to the amplitude of the resulting wave when two waves overlap? Support your answer with specific evidence. в I U 8 D fx Qave Superposition 1 240 frames per second 8x slow motion Direct Measurement Video © 2015 Peter Bohacek ISD197 TRIAL Change trial 1

Waves in a Pool O While in the pool, you splash water and produce a wave that completes 3 complete cycles in 2 seconds. The pool is 24 meters long. Use the diagram below to help you answer the following questions. The frequency of the waves are type your answer. Hz. Pool Pool Side Side 24 meters

A wave has angular frequency 26.0 rad/s and wavelength 1.40 Im. Part A What is its wave number? Express your answer with the appropriate units. HA Value Units Submit Previous Answers Request Answer

Sound Wave The oscillations in air pressure representing the sound wave for a musi-cal tone can be modeled by the equation y =0.05 sin (500pt + 10p), where y is the sound pressure in pascals after t seconds.a. Sketch the graph of one complete cycle of the sound wave.b. What is the phase?

A state highway patrol car radar unit uses a frequency of 6.50x10° Hz . Part A What frequency difference will the unit detect from a car receding at a speed of 64.5 m/s from a stationary patrol car? ? Af = Hz Submit Request Answer Provide Feedback

Waves in a Pool O While in the pool, you splash water and produce a wave that completes 3 complete cycles in 2 seconds. The pool is 24 meters long. Use the diagram below to help you answer the following questions. The velocity of the waves are type your answer. m/s. Pool Pool Side Side 24 meters

Two loudspeakers, A and B, are driven by the same amplifier and emit sinusoidal waves in phase. The frequency of the waves emined by each speaker is 730 Hz. You are standing between the speakers, along the line connecting them and are at a point of constructive interference For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of Loudspeaker interference Part A How far must you walk toward speaker B to move to reach the first point of destructive interference? Take the speed of sound to be 344 m/s Express your answer in meters Submit Request Answer 2 11

When the Hokee fish migrates from deep Pacific waters to the west coast of North America each summer, the males begin singing their "love song", which some describe as sounding like a low-pitched motorboat. The love song consists of a single note: the A flat (A) three octaves lower than the middle A in the table shown below. This frequency is the same in seawater and air. What is the wavelength of the Hokee fish's song in seawater if the speed of sound in seawater is 1531 m/s? (enter your answer with 4 significant figures) possibly useful: v = Af TABLE 14-3 Chromatic Musical Scale Note Frequency (Hz) Middle C 261.7 C(C-sharp) D (D-flat) 277.2 293.7 D*, E 311.2 E 329.7 349.2 370.0 G 392.0 G*, A 415.3 440.0 A*, B 466.2 493.9 523.3

1. The witch of Agnesi curve shown in red in the diagram below is used to model water waves and the distributions of spectral lines The parametric pair describing what you see is: x = 2a tan(@t) and y= 2a cos²(@t) where a is the radius of the circle and w the angular velocity the circle is "traveling" at. Both a and a are 10 constants. dy y'. Simplify this expression in terms of sin(@t) and cos(@t). d x 1.1 Determine an expression for 1.2 Determine the acceleration vector a for the parametric pair. Simplify your vector in terms of sin(@t) and cos(@t).

For items 1-2, choose only one correct answer. 1. What is the speed of sound when the temperature is 39°C in aluminum? A. 5119.2 m/s B. 5122.2 m/s C. 5123.4 m/s D. 5127.4 m/s 2. What is the gravitational field strength in N/kg on the surface of the sun? Given: r= 6.96x10^8 m m= 1.99x10^30 kg A. 1.6 B. 9.8 C. 127 D. 274

Wave on a string: set wave to oscillate, end type to no end, amplitude to 1.20 cm, frequency to 2.5 hz, damping to 0,and tension to high, make sure to check the rulers and timer boxes a. Measure wavelength and period wavelength____cm, period _____s b. Calculate the frequency from the period you found in a. c. Calculate the wave speed based on your findings in a. and b. d. Assume the "high" position of the tension as 0.00008 N, calculate the linear mass density () of the string. = ___kg/m

a. Explain the empirical relationship between mean ,median and mode for the data of your own field physics. Ilustrate graphically relative position of mean, median and mode for frequency curve which are skewed to right and to be left. b. Explain in your own words that how this course "Probability and Statistics" will be helpful to solve different problems in the field of Physics? Your answer should not be matched with other fellows. THE END

Part C. Standing wave in an Air Column Table 3. Copy and paste the table into the box below. You may add more rows to the table if necessary. No. of Cycles Wavelength Air Column Length L Trial Must be in decimal form (m) (m) (ex. 1.00, 1.25, 2.50) 1 2 Edit Viow Incert Format Toole Table

Waves in a Pool O While in the pool, you splash water and produce a wave that completes 3 complete cycles in 2 seconds. The pool is 24 meters long. Use the diagram below to help you answer the following questions. The period of the waves are type your answer.. seconds. Pool Pool Side Side 24 meters

Learning Goal: To learn the properties of logarithms and how to manipulate them when solving sound problems. The intensity of sound is the power of the sound waves divided by the area on which they are incident. Intensity is measured in watts per square meter, or W/m². The human ear can detect a remarkable range of sound intensities. The quietest sound that we can hear has an intensity of 10-¹2 W/m², and we begin to feel pain when the intensity reaches 1 W/m². Since the intensities that matter to people in everyday life cover a range of 12 orders of magnitude, intensities are usually converted to a logarithmic scale called the sound intensity level 3, which is measured in decibels (dB). For a given sound intensity I, B is found from the equation where Io B = (10 dB) log ( In = 1.0 × 10-¹² W/m². The logarithm of x, written log(x), tells you the power to which you would raise 10 to get x. So, if y = log(x), then x = 10%. It is easy to take the logarithm of a number such as 10², because…

Speed of Sound Another student does this lab slightly differently from us; they define "D" as the round trip distance from the speaker to the reflector and back. In order for this student to get a linear graph where the slope should be the speed of sound, they should plot vs. time. (Assume that they still measure the time exactly as you did). 4D 2D D/2

Learning Goal: To learn the properties of logarithms and how to manipulate them when solving sound problems. The intensity of sound is the power of the sound waves divided by the area on which they are incident. Intensity is measured in watts per square meter, or W/m². The human ear can detect a remarkable range of sound intensities. The quietest sound that we can hear has an intensity of 10-12 W/m², and we begin to feel pain when the intensity reaches 1 W/m². Since the intensities that matter to people in everyday life cover a range of 12 orders of magnitude, intensities are usually converted to a logarithmic scale called the sound intensity level 3, which is measured in decibels (dB). For a given sound intensity I, B is found from the equation B = (10 dB) log Io where Io = 1.0 × 10-¹² W/m². The logarithm of x, written log(x), tells you the power to which you would raise 10 to get x. So, if y = log(x), then x = 10%. It is easy to take the logarithm of a number such as 10², because you…

Waves in a Pool O While in the pool, you splash water and produce a wave that completes 3 complete cycles in 2 seconds. The pool is 24 meters long. Use the diagram below to help you answer the following questions. The wavelength of the waves are type your answer.. meters. Pool Pool Side Side 24 meters

Two loudspeakers, A and B, are driven by the same amplifier and emit sinusoidal waves in phase. The frequency of the waves emitted by each speaker is 697 Hz. You are standing between the speakers, along the line connecting them and are at a point of constructive interference. For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of Loudspeaker interference Part A How far must you walk toward speaker B to move to reach the first point of destructive interference? Take the speed of sound to be 344 m/s. Express your answer in meters. x = 17 ΑΣΦ Submit Request Answer ? m

Question 6 This question is related to #11 on the worksheet. What is the speed of a wave with a wavelength of 2.0 m and a frequency of 210 Hz? Your answer: O 0.0095 m/s 105 m/s 208 m/s 420 m/s

DE-3 A train is traveling south at 50.0m/s and is blowing its 15,000Hz whistle continuously as it approaches the intersection of the track and the road. A car is traveling west at 30.0m/s on the road toward the intersection as shown in the figure. a) Find the wavelength of the sound waves traveling south from the train. b) Find the wavelength of the sound waves traveling north from the train. c) The sound waves emitted by the train in the position shown arrive at the car when the car is in the position shown. Find the frequency heard by the car driver in the position shown. Train V₁-50.0m/s 120m + W S 90.0m Vc=30.0m/s car

Part A You are standing 2.5 m directly in front of one of the two loudspeakers shown in (Figure 1). They are 3.0 m apart and both are playing a 686 Hz tone in phase. As you begin to walk directly away from the speaker, at what distances from the speaker do you hear a minimum sound intensity? The room temperature is 20°C. Express your answer in meters. If there is more than one answer, enter your answers in ascending order separated by commas. m Submit Request Answer Figure 1 of 1 Walk 2.5 m 3.0 m

A Click Submit to complete this assessment. Question 3 An underwater vehicle sends out a short sound. An echo of the sound is perceived 6.84 s after sending the pulse. If the speed of sound in the ocean is 10,191 m/s, how far away is the reflecting surface? Round off answer to the nearest whole number. Input both the number and the symbol of the unit.

Family History I-learn DDisney+ | Movies a... Bb Cassia County Scho... M HBO Max pius Help F Applied Physics I: Section 4 (F21) 7 W14 Individual Exercises vidual Exercises on 2 What is the wavelength of a 446 Hz sound wave if it is traveling in air at a temperature of 20.0 degC? Number Units Submit Assignment Quit & Save 31°F re to search

(Figure 1)shows a standing wave oscillating at 150 Hz on a string. You may want to review (Pages 460 - 463). Part A What is the wave speed? Express your answer with the appropriate units. v = 30 Submit Previous Answers Figure Correct Here we learn how to find the wave speed by Provide Feedback 50 cm

Assignment 1 Initial Model: How do you hear someone through a cell phone? Label and draw on the model below  to try to explain how cell phones work. Now, watch this video.  Take notes in the graphic organizer below. https://youtu.be/USCBCmwMCDA   Topic in Video Notes How do you store or represent information using electricity?   Binary System vs. Decimal System   Text in Binary   Images in Binary   Sound in Binary

Two waves travelling at the same speed. Which statements about the figure below are correct?   Group of answer choices Double the amplitude of a double the speed it travels. Amplitude of a is twice the amplitude of b. A has a lower frequency than b. A has a higher frequency than b. Amplitude of a is half the amplitude of b.

Q1.) Briefly explain why the primitive and conventional representations of the bcc-Na phase produce the same XRD pattern.